What are we talking about here? An 18.5" or a 22" or a 24"? Those make significant differences if compared to an 1895 Marlin in .45-70, in muzzle velocity, recoil and noise. I've owned 4 1895 Marlins in .45-70 and I can assure you I'd never own one again in 18.5" with porting and hot loads!!! From a 22" Marlin in .45-70, a 465gr hardcast at 1900 fps is much more than a shove. The recoil is at least the equal of a hot loaded .375 H&H, and I've owned those as well. A 405gr at 2100 fps is almost as much as the 465gr at 1900, but not quite. But it can be handloaded to become a very mild-mannered beast using a 300gr at 1600 fps. So, there's no such thing as simply "How does a 450 Marlin compare in recoil to the .45-70?" The .45-70 can always be loaded to slightly higher velocities in an 1895 with equal barrel lengths due to the case holding slightly more of the same powder when shooting the same bullet in the same length barrel. Then, there is the Ruger #1 in .45-70... that's another beast entirely. There, you're talking about ballistics that approach the .458 Win Mag. The NEF is about mid-way between the Ruger and the Marlin in .45-70. I've owned and used them all. My favorite is the Ruger that I've had long-throated... it is fully the equal of a .458 Win Mag.