Swift is unbelievably sexy, undoubtedly talented (and i hate country music) and has a very home town, down home southern belle vibe that makes her very appealing.
Shes a great song writer too. But musically, overall, GaGa has more raw talent IMO - and I know music majors that agree. I can understand why she wouldn't appeal to a lot of people. I hate country music and I recognize Swift's talent for sure - not sure why so many can't recognize GaGa's whether they like the music or not.
OK, a moment of seriousness:
GaGa's songs are catchy club songs for the most part.
Good songs:
Bad Romance
Paparazzi
Alejandro
Just Dance (maybe)
Poker face (I don't really like it but it's original)
Bad Songs:
Everything else
In each case, the songs play out and burn out and die in glorious brightness.
Taylor Swift's songs are enduring and engaging, as they are both catchy and lyrically substantive.
Virtually all of Taylor Swift's songs on her album are unique and great in their own way. I mean, it's pretty amazing actually.
This coming from someone who likes a total of 3 country singers. Taylor Swift, Rascal Flatts and occasional Trace Adkins.