I'd go with the one you shoot the best. Both are capable of doing the job. My Wyoming Rocky Mtn. Bighorn/Elk combo hunt was classic: I took a 270 and a 375.... used the 375 on elk, then tested both before the sheep hunt. The 375 shot better, I was more confident, and ended up taking a very nice ram at 325-350 yards with the 375. Take both, if possible, shoot them in camp and then make a decision. Always nice to have a backup rifle that you are comfortable with. Good luck.