Kinetic Energy = 1/2 MV^2
Momentum = MV
So really, they're both velocity dependent. I will agree that once you start getting up there in velocity that it does blow stuff up. I really like the .264 Winchester on deer, but it blows them up much more than a .270 Winchester does. I use a .270 Weatherby a lot and it and the .264 are about equal on blood shock. You have to be careful with shot placement or you'll lose a lot of meat.
And as said above, the old .45-70 (I have a Ruger No. 1 and a Marlin 1895 Cowboy in that) hits them harder all out of proportion to what the ballistics say. I guess it's like chucking a cinder block at them. I load a 350gr Hornady to about 1850 ft/s in the Marlin. I've only shot one deer with it, and he did run 50 yards (it was a good shot) before he dropped (the .270 Wby and .264 usually kills them before they hit the ground), but the internal carnage from that big chunk of lead was as bad if not worse than anything I'd seen of the other two. Went in through the lung area, must have hit the far shoulder and turned 90 degrees left and headed aft, hit something back there and turned 90 degrees right and tried to exit out the rear hind quarter. I recovered the bullet sticking out the hide. I'm hesistant to load the Marlin any hotter than that....sometimes the lever comes loose (might just be me doing it from recoil...). My Ruger has a defect and always has....it goes off sometimes when you shut the lever so I never shoot it. Need to send it back to Ruger....
I'll give Taylor credit for trying to factor bore diameter in there somehow. He tried to quantify something that's not easily quantified.