Sort of, magnets feel a bit stronger on the MGC 4x4x4
It is probably 2nd best 4x4x4 and best in it's price range and feels similar to the MGC 5x5x5 AndMGC 6x6x6
Speedcube brands generally have a unique feel that is replicated across all their big cubes.
I never felt it to be similar, but probably because of my setup. The 4x4 is faster and has stronger magnets. Also, it is smoother and feels less like a big cube(less squishy and almost no locks). The 5x5 is nice, but has lockups sometimes.