different car different use.
Stock Spec V faster the msp in a stright line. Handles like s*** non-independent rear suspension. I know i drove one and almost give the sales lady a heart attack.
stock MSP slower in stright line. but well own the spec v on the turns.
As for the weak motor point. Both cars have weak motors. I've talked to a lot of spec v owners who blew up their stock motor. Same cheap car.
Now if we going to talk about modded vs modded car... U should look up a members like Bryan or discreetspeed i'd guess both of them are in the 13 second range or SonicRacer with $1300 mods and got into 13 second range safely.
once again different car different use