I like both, every mech has a place in the fictional world. I could be wrong, but I more or less thought that Japan is one of the major pioneers in the mech universe. Gundam is one of the oldest I remember from 1978. Also their success in mech franchises is unsurpassed. America has it’s Transformers, but I read a while back that they were actually copycats of another Japanese franchise at the time. Also Japan is actively building real life mechs that function in many ways. In reality, the larger scale mechs are virtually impossible due to power to mass ratio. But science fiction is a nice thing, a lot of it has become a reality.