hey if you read this or any one who knows plz reply

ok i am wondering stock vs. stock with clutch spring how much slower is the kfx then the ds 650 what one is better for trail riding and hill climbing and how will the v-force do at the dunes how much slower will it be than the ds? i dont know if i want the ds maby i want the 700 power and the ease of auto but my freind has a stock yfz450 i dont wana fall behind what do you think its get the new baja x or the 700 both 05's