Fin Nor 85 and 95 are simply too heavy as their weights are 37.9 oz and 38.9 oz, respectively.
The weights of 65 and 75 have slight difference as 65 is 31.2 oz while 75 is 32 oz. However I feel the line capacity of 300 yard of 25 lbs mono of 75 is minimum for big tuna. Forget about their braided line capacity of the reels suggested by Fin Nor. They are totally wrong. If you are lucky, you'll get 300 yard of 80 lbs braided line on 75.
So my choice for tuna with the reel is Fin Nor 75.
The weights of 65 and 75 have slight difference as 65 is 31.2 oz while 75 is 32 oz. However I feel the line capacity of 300 yard of 25 lbs mono of 75 is minimum for big tuna. Forget about their braided line capacity of the reels suggested by Fin Nor. They are totally wrong. If you are lucky, you'll get 300 yard of 80 lbs braided line on 75.
So my choice for tuna with the reel is Fin Nor 75.