I agree with Cinch, The key is how well you can handle the guns. If I was you I would check out the area that you are going to hunt in and get an idea of the kind of shots you will take. Based off that I would go to the range and attempt a number of shots with both guns at different yardage/angles/rests and determine which gun you shot better and pick that one.
I hunt elk every year and carry a 15.0 lb gun where ever I go. Physical fitness may be what makes the decision for you. Thats my 2 cents.
GOOD LUCK, once you go elk hunting, you will never be the same........ that is one thing we can all agree on!