Questions about the Car Builder motor specifications

Hello

First question : the Car Builder says in JWRC that all motors have the same level of performance. Does it apply to each engine size, separately (all 1.5 = same) ? Or all engine size are equivalent (1.5=1.0T=1.6T...) ?

Second question : how close to the real JWRC/WRC2 and WRC car are the ones made from the Car Builder ?