My stock B5M FL with 17.5 M3 SS and v3.1 HW SS esc is way faster than my B5/Mach2/$50 HW justock. I'd say it's almost as fast as the experts with pucks/lighter cars at our local track. I can't imagine there's a better bargain at $80-90.
Not apples to apples, but definitely the combo is a ton faster, like 20%. It weighs 40 grams less and has better bearings though.