The 90 is going to be much more stable. It's thicker legs will help achieve that.
The 80 will only allow you to mount the Anvil to the factory mount. For a more rigid setup one if my plates on the 90 is a better setup
Bought it here scope in March. . Wasn't able to get the rings til Late April. Was on the Rifle for 60 fireforming rounds and I had to send the stock in for sone work. So virtually New scope
1950$ shipped insured
It works well. I have a qd China made throw lever on my leveling base. I prefer it fir my spotter at matches ... its less confusing for others if they make adjustments. Vs having my binos or spotter floppi g over
I transition from shooting off my RT90 with a 52mm ball head to the stock leveling base. And anvil 30 without real differences. My 2 Vets QDT tripod now is the new home for my Anvil and it seams a little flex comes from the legs.
Would be a great for spotter or rifle
If just for a spotter a 40mm ball would suffice
If you wanted a cheaper route the Desmond DLow55 is less than half the BH55
It's just getting comfortable with the tension throw lever. I use my thumb and thumb pocket . It only requires small movements to manipulate a rifle. But a pair of Binos or spotter can require more finesse