Mine are on 700's with 65 lb backing and it's usually one of my outside boards (10 color). Not even close to running out of backing even with a big screamer on it. Gear ratios are both 4.2:1 so there's no gain there, the 800 is just a wider spool, not bigger diameter so there's no gain on an 800 from a reel torque or speed perspective. That being said- we run coppers on either Convector 55's and Tekota 800's