I have both in sporter and target rifles - I mainly shoot the 308, but the 7-08 outperforms it at target and long range shooting. Put a 150 gr SMK under a good load of R15 and its 1000yd performance is very impressive. For hunting, my gal has dropped 2 moose with the 7-08 with 140 NAB, both didn't go 10yds, and both were pass-thru's.
In shooting at wet phone books, the 7-08 out penetrated the 308 by 10-15% using the same bullet.
The 7-08 is mislabelled as a sissy cartridge, but from first hand experience that statement simply isn't true. Recoils less, hits just as hard, drops less... whats not to like?
Keep both and have fun!