Well you win 3 ways:
1) It is lighter
2) It is larger, so its internal resistance should be less, so you should draw fewer mAHr than in the previous battery.
3) Since "C" is also larger, you win again for same reason in (2)
So net result is your battery should be cooler, less mAHr should be pulled out, and % used should also be better (fewer mAHr/larger capacity). Sounds like a win3 in my book!