The car with 185 lbft tq would make 230 whp at a lower RPM (aka earlier)than the car with 150 lbft tq (hp=tq * rpm/5250, you can go into specific calculatinos yourself), but there's also the question of power band, which is much more important than peak power...basically there's too many factors, and if you need to ask about such a retarded question then you should reconsider doing any sort of engine stuff...

cliff's notes: there IS such a thing as a stupid question, thanks to our original poster