We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-23 · 7 min read · Independent comparison
Most people should buy headphones. The single reason: they sit on or around your ears instead of inside them, so you get hours of comfort, a mic you can actually talk into, and no fiddling to get a seal — which is exactly what daily listening, calls and work actually demand.
• Headphones — best if you want one pair that handles calls, video, commuting and long listening sessions without you thinking about fit or ear fatigue.
• Iems — best if you want maximum detail and isolation for the money, and you're willing to seat them properly in your ear canal every time.
Headphones are the default for a reason: they're the lowest-friction way to listen. You put them on, they're on. There's no tip rolling, no seal check, no "is the left one seated right?" moment. That matters more than spec sheets admit, because the best audio gear is the gear you actually reach for.
The design here is a wired, in-ear style bud — Apple's EarPods with a Lightning connector. The shape is built around the geometry of the ear rather than a plain circle, which the brand says makes it comfortable for more people than typical bud-style headphones. In practice, that's the whole pitch: a plastic, lightweight earbud that rests in the ear without a deep seal. At 22.68 g it's about as unobtrusive as wired audio gets.
The defining specs tell you what it's for. It's wired over Lightning, so it's aimed squarely at iPhone, iPad and iPod touch owners running iOS 10 or later, including iPadOS models. Sensitivity is rated 94 dB with a dynamic driver. There's a built-in remote on the cord for volume, playback and answering or ending calls, plus an integrated microphone for phone calls, FaceTime and Siri. Noise control is listed as sound isolation — meaning passive blocking only, not active cancellation.
The trade-off is exactly what you'd expect from an open, non-sealing bud: you don't get strong isolation, and bass doesn't hit like a sealed in-ear does. You also need a Lightning port. If you've moved to USB-C, this isn't your cable.
IEMs — in-ear monitors — are the enthusiast's answer to "how much sound quality can I get from something tiny?" They seal into your ear canal, which does two things at once: it blocks outside noise passively, and it lets the driver move air more efficiently, which is why bass and detail usually feel a step up from a loose-fitting bud.
The Moondrop CHU II shows what this category is about. It uses an aluminium-magnesium alloy dome composite diaphragm — a rigid, light material that the brand says extends treble bandwidth and reveals finer detail. The suspension behind that dome is made from two different polymers, which Moondrop says gives punchier bass and greatly reduced nonlinear distortion. Rated nonlinear distortion across the full frequency range is under 0.05%. Impedance is 18 ohm and sensitivity 119 dB, which means it's easy to drive from a phone or a cheap dongle. Frequency range spans 20Hz–20KHz from a 10 mm dynamic driver.
The build is the interesting part. The cavity is alloy-cast for rigidity and texture with a protective paint layer against corrosion, and the nozzle is a separate brass CNC component chosen for precision and density. Best of all, that nozzle's front end unscrews so you can swap the acoustic filter yourself — and if a filter clogs or gets damaged, replacing it costs far less than replacing a whole nozzle. The cable is a universal 0.78 mm two-pin design, so you can swap cables or run a Bluetooth neckband or TWS ear-hooks instead.
The trade-off: IEMs demand correct insertion and a good tip seal. Get it wrong and they sound thin. They're also less convenient for calls and quick conversations, and this particular model has no inline controls or mic — it's a listening tool, not a headset.
Fit and long-session comfort. Headphones win for most people. The EarPods rest in the ear without a deep seal, and there's no pressure build-up. IEMs seal your canal, which is more isolating but also more fatiguing over hours and far more sensitive to tip choice. If you wear something eight hours a day, I'd take the earbud shape.
Isolation and detail. IEMs win clearly. A sealed canal plus a rigid alloy diaphragm and sub-0.05% distortion figures is a recipe for hearing things a loose bud smooths over. On a noisy train or in a shared office, the CHU II's passive isolation is doing real work that the EarPods simply can't.
Versatility and control. Headphones win. The EarPods have a cord remote for volume, playback and calls, plus a built-in mic for voice and Siri. The CHU II has touch control listed but no mic and no noise control — it's for music, and you'll be reaching for your phone to change tracks.
Ownership and repair. IEMs win on longevity. The CHU II's replaceable filter, swappable 0.78 mm cable and metal cavity mean a failure is a cheap part swap, not a new purchase. The EarPods are a sealed plastic unit — when the cable or connector dies, that's the end of it.
Which Should You Get?
If you want one pair for everything — calls, video, casual listening, all day, no fuss — get headphones. That's my recommendation for the majority of shoppers.
Get IEMs instead if music quality and isolation are the point, you're happy to seat them properly, and you don't need a mic on the cable.
The Apple EarPods with Lightning Connector is the sensible pick if you're on an iPhone or iPad with a Lightning port. It's a wired, lightweight (22.68 g) plastic earbud shaped around the geometry of the ear rather than a plain circle — Apple's claim is that this makes it comfortable for more people than typical bud-style headphones, and that's the honest reason to choose it over fancier options: it disappears in your ear.
You get a dynamic driver rated at 94 dB sensitivity, a built-in remote on the cord for volume and playback, an integrated microphone that handles calls, FaceTime and Siri, and passive sound isolation rather than active noise cancellation. It works with Lightning devices running iOS 10 or later, including iPadOS models, and carries a one-year limited warranty. If your priority is a no-drama daily earbud for calls and listening, this is the one I'd point you to.
The Moondrop CHU II is the pick if you want genuine in-ear performance. Its 10 mm dynamic driver uses an aluminium-magnesium alloy dome composite diaphragm for a rigid, light dome that Moondrop says extends treble and surfaces detail, backed by a dual-polymer suspension for punchier bass. Rated nonlinear distortion is under 0.05%, impedance is 18 ohm, sensitivity 119 dB, and frequency range is 20Hz–20KHz — easy to drive straight from a phone.
The practical wins are the build and repairability. Alloy-cast cavity with a corrosion-resistant paint layer, a separate brass CNC nozzle, and a detachable front end so you can replace the acoustic filter yourself instead of replacing the earphone. The 0.78 mm two-pin cable is universal, so cable swaps or a Bluetooth neckband are options. It ships with a cable, eartips and a protective case, and carries a one-year manufacturer warranty. No mic, no active noise control — this is a music-first tool.
Not automatically. Sealed IEMs with a rigid diaphragm and low distortion, like the CHU II, often reveal more detail and deliver stronger bass than a loose-fitting earbud. But "headphones" covers everything from cheap buds to big over-ears, so the answer depends entirely on which two you're comparing.
Only if the model has a mic. The Moondrop CHU II lists no microphone and no inline controls, so it's for listening. The Apple EarPods, by contrast, have a built-in mic and a remote for calls and volume.
For most people, a non-sealing earbud like the EarPods is easier over long stretches, since it doesn't pressurise the ear canal. IEMs seal deeper, which isolates better but can feel fatiguing and depends heavily on getting the right tip.
Passively, yes — a good seal blocks a lot of ambient sound. Neither of these models has active noise cancellation, so what you get is isolation from fit, not electronics.
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See also: headphones vs surround sound, headphones open vs closed back, headphones vs speakers