Bellichick admitted taping the practice and apologised to the NFL, his team and players. He was punished accordingly. If people think he's the only coach to ever do it, you're deluding yourself. The difference is that he got caught. I suspect that had a part to play in deciding the severity of his punishment.
'Cheating' aside, anyone who doesn't think that Bellichick is one of the best coaches in the game and a first ballot Hall of Famer is crazy. Also, anyone who thinks the Patriots only won because they taped a few practices is similarly clueless.
And as for Arlen Spector, he's a bell end who would have been better trying to serve the people of Pensylvannia rather than poking his nose in other people's business. Well, not anymore since he switched parties and lost an election.