The V3 motors are 2312 and they have "feet", whereas the V2 motors are 2212, and don't look like they have "feet".
The ESCs are the same hardware on both versions, but different firmware. You need to be sure to get ESCs that are for the V3. The stripe on the capacitor should ideally be the same color as what you have now.
When installing the motors, it's important to deal with the wiring properly. You should use some silicone glue near the solder points to secure them, and the wires should be run apart from each other. There might be some other considerations; you should search these threads.