Multi-Class Ships are very dangerous because the only way to tell they are Multi-Class is if you recognize the Starfighter, Or when they attack. This is the same for what type of Multi-Class Starfighter it is, One way to classify what type of Multi-Class is their Weapons Systems (See Page 8-9), Their Health (Only can be seen after piloted or after enough combat against Starfighter), And their speed.

Weapon Systems: Weapon systems are easy enough to figure out on a Multi-Class Starfighter because the pilot will most likely use all of them commonly in the situation they see fit due to changing circumstances in the battlefield or even simple trainings. The weapon system for Multi-Class Starfighters is a weapon system that is mixed with another weapons system typically found on a different starfighter class. A good example of this is the Naboo N-1 which has the Blaster Cannons Weapon System and the Torpedoes Weapon System. 

Health Amount: Health Amount is the most difficult to figure out as you can only figure it out after you have flown the ship in combat, Or have gone against said ship enough times to figure out the Health Amount. There are three standardized health amounts seen in Star Wars: Space Battle as listed below;

Interceptor: Least Amount of Health.

Fighter: Decent amount of health.

Bomber: Most amount of health.

As it is listed above, Health amount varies from class type and varies from Multi-Class Ships as well. This is why you will only be able to figure it out in combat, Because you wouldn’t be damaged consistently.

Speed/Maneuverability Amount: Speed/Maneuverability like the Weapons Systems and Health Amount will vary from Starfighter Class to Starfighter Class. You most likely will be able to tell from watching the ship before/during/after combat if you are going against it or if you are the pilot. There are four standardized speed amounts seen in Star Wars: Space Battle (One of which being Multi-Class Specific) as listed below;

Multiclass: Fastest/Tied with Interceptor maneuverability.

Interceptor: Faster/Tied with Specialized maneuverability.

Fighter: Decent speed/Decent maneuverability.

Bomber: Slowest speed/Least maneuverability.