I've tried the cartridge-pusher & it's slower & more awkward for me.
Also tends to kickback & dump rounds on the ground.
On a lever gun I intend to keep, I have to get the gate's edges rounded off, after which it's no longer as much of a problem.
The only exceptions to this are my '51 Model 94 in .30-30 & my new-this-year Winoku Model 73 in .45 Colt.
Neither of those have the typical sharp edges.
Otherwise, after putting a hundred or more through a standard lever-action in range testing, my thumb always comes home sore & torn up.
Henry centerfires are always a pleasure to work with, the loading is entirely painless.
The cartridge-pusher is just too cumbersome, for me.
Denis