I've never been to Borgata so I'm not familiar with their program, although I did read recently that they are now part of MLife.
From what I see online they do more frou frou stuff for their players, like mailing them birthday cakes. And the room pictures seem fancier than what I got when I stayed at Caesars AC as a Seven Stars. But my room there was totally acceptable and sufficient for my needs.
I don't necessarily share your level of enthusiasm for CET. But I agree I don't really understand, from what I've read, the love that Borgata seems to get from a lot of players.