The 574 Legacy has a slightly larger toe box area.
Go down half a size. (ie: I am a true size 9.5, so I buy my 574 Legacies in a size 9).
Comfort Factor Ratings:
Cushioning (Softness): 6/10
Stability (Firmness): 6/10
Cushioning to Stability Ratio: 6:6
Midsole Shape (Foot support): 5/10
The 574 legacy is softer than the classic 574.
The 574 Legacy retains ENCAP and has a thicker, softer midsole in contrast to the classic 574. You get a better amount of softness, while still retaining the solid firmness of most retro runners. The midsole shape is pretty average, like the classic 574, and is on par with most retro runners. I personally prefer a softer shoe, so I personally think the 574 Legacy is more comfortable than the classic.