It's only better in YOUR eyes......
What, you don't believe in physics?
No, I believe in penetration.
It's all in the bullet reaching the boiler room.
Given similar bullet construction....momentum of a heavier bullet will likely pay dividends, especially when bone is encountered.
.338's normally launch bullets with more mass. I have a 338, but haven't used it for elk (yet). 7mm's and 30's for me......heavy-for-caliber, well-constructed bullets. Get loose-enough fillings with those.
Momentum:
a property of a moving body that the body has by virtue of its mass and motion and that is equal to the product of the body's mass and velocity; broadly : a property of a moving body that determines the length of time required to bring it to rest when under the action of a constant force or moment.
At least no one brought up those VLD's in this thread.