There was a time when I would have chosen a 7mm-08 over a .260 simply because I've been shooting a 7mm RM for 30 years and have quite a stock of bullets suitable for the 7mm-08.
I also shoot a .280 Rem and a bunch of .30's and the only thing I have under my 6.5-06 is a .257 Bob. I think now a .260 would get the nod.
In either case, I wouldn't worry about one being adequate and the other one less so to a point where an animal would notice.
Coyote Hunter - NRA Patriot Life, NRA Whittington Center Life, GOA, DAD - and I VOTE!
No, I'm not a Ruger bigot - just an unabashed fan of their revolvers, M77's and #1's.