Well, none of it is correct. S and X are mostly aluminum, Model 3 is mostly steel. S and X use AC induction motors, Model 3 uses PM motor (yeah, Raven and all, but historically this is true). S and X use 18650 cells, Model 3 uses 21700 cells with a different cooling architecture. Your definition of "the same" covers almost every electric made, not just Tesla. It's a stretch too far.