Is Showtime > HBO?

Oz, Six Feet Under, Sopranos, Deadwood, Band of Brothers, Sex and the City.........all giants in HBO's history that I tried to watch....

now, all they have is Generation Kill (a lame attempt to channel Band of Brothers into Iraq) and Entourage (still fantastic, but sick of the half-seasons).

I recently switched from a Marriott to a Westin hotel.  The Westin, shockingly enough, doesn't offer HBO.  They offer Showtime.

After fuming about the lack of HBO, I finally started watching Showtime, and I'm blown away by the quality of their original programs.

Dexter is creepy...creepy enough to get prime time syndication (edited) on CBS.
Weeds is fun....fun enough to rack up Emmys....and fun enough to employ Kevin Nealon. 
Bullshit is um interesting.....too libretarian for me, but I still enjoy it.

I know that I'm working with a ridiculously small sample here (3 hit shows vs. the HBO list above), but with HBO's major hits on the decline (both Entourage and Curb slated to end in the next few seasons), is this a changing of the guard in the Premier category?

Does Showtime have the ability to carry the torch?