ive owned them both. i bought the 2005 early release 600 ho sdi renegade and rode the 2004 winter and sold that to me brother. i had to have the 800 ho PTEK renegade so i bought the 2005 regular season model that following fall and rode that during the 2005 winter. GUESS WHAT!!!!????? i rode alot with my brother and we switch back and forth frequently and even raced each other from stop to full speed for miles. FOR MILES.....OH DID I SAY FOR MILES?? I MEANT FOR LOTS OF MILES!!!! straight up---- i owned both of them so i should say that the 800 was just impressive, RIGHT??? WRONG-----heres the down on the sleds in comparison.
the throttle responce is almost immediate and not as heavy to push on the 600, and its very crisp, meaning no hesitation. the 800 is harder to push and your thumb does get tired early in the day, and if you hit the throttle at low speeds , it would hesitate, almost flatten for a second before getting a good breath. the 800 is also heavier in the front. harder to turn than the 600, but keep in mind the shocks on the front are different on each sled. the early release model was delivered with upgraded shocks that i liked better than my 800. both sleds suspension were tuned exactly the same. that 600 steered so easy. the 600's engine just flat out ran smother than the 800. that 800 vibrates to much compared to the 600.
now the side by side comparision. top speed in normal riding conditions was ..THERE WAS NO COMPARISION!!! THEY BOTH COULD NOT OUT RUN EACH OTHER. yes, ive seen the comparision of 600's and 800's on the ice drag strips were they ran studs and were set up to race. yes ive seen the 800 kill most other makes and models . but out in the normal riding conditions. what you see at the drag stripes and on the trail or lake is truely a different story. yes the 800 may be a mile or two faster top end but dont be surprise----------the 600 is the better deal for your dollar. period. i want a 600 sdi again.
thats my story and good luck in your future pick. just picking a rev platform is no mistake. have fun this year and be careful. peace :beerchug: