Similar in that things are being cut. For differing reasons perhaps. but they are both cut. hence the similarity.
One episode of the simpsons was actually changed. Homer had an academy award he astole from Haing Ngor -- in reruns it was changed to "Don Ameche" after Ngor died. That's a real change, not just a cut.
I think the "Censorship" issue is a little overstated. they're just bleeping out stuff. I think it's kind of couterproductive since we ALL KNOW what they're saying, but still. it's not like they're changing the content by making M & T rewrite episodes on orders from the sponsors.
I like south park, but it seems that anything that doesn't satisfy the hardcore fans' wishes is immediately blasted. Terrence and Phillip weren't that great but it really wasn't THAT bad. People went crazy.
Likewise with the bleeping. The fact is I can tell EXACTLY what Eric Cartman is saying about Kyles mom or whatever, bleep or no bleep.