Their both very even. It depends on conditions and rider. On pavement and quick shifting the 700xx will win. Loose surface and bad shifting the gade 800 will win.I'll never understand why they make utility atvs that fast like my buddys outlander 800 can hit 130km/h down hill. That's an accident waiting to happen.
I thought I read when our bikes came out first in a review that the XX was faster stock vs stock.