My bud has a 300ex and, stock blaster VS stock 300ex the blaster is faster, but the 300ex brakes and suspension is way better. Im 5'10" and about 200lb and the 300ex is a little more comfortable then a stock blaster, but the way my blastere is moded now it is way faster, way better handling, and way more comfortable then a 300ex and warrior.
If you are looking for a bigger and faster ATV stock VS stock Id get a 400EX...