Every artist learns through imitation, but I rather doubt the aim of these things is artistic development. I assume they're either homages or satiric riffs, and are not intended to be taken too seriously as works in their own right. Otherwise I should be talking to a copyright lawyer.
Bill WattersonI'd always enjoyed the comics more, and felt that as long as I was unemployed it would be a good chance to pursue that and see what response I could get from asyndicate, as I didn't have anything to lose at that point. So I drew up a comic strip - this was in 1980 - and sent it off and got rejected. I continued that for five years with different comic strip examples 'til finally Calvin and Hobbes came together. But it's been a long road.
Bill WattersonCalvin: Somewhere in Communist Russia, I'll bet there's a little boy who has never known anything but censorship and oppression. But maybe he's heard of America, and he dreams of living in this land of freedom and opportunity! Someday, I'd like to meet that little boy... and tell him the awful TRUTH ABOUT THIS PLACE!! Calvin's Dad: Calvin, be quiet and eat the stupid Lima beans.
Bill Watterson