Why choose...
http://www.bimiteetop.com/
Actually, I have had both Bimini tops and T tops I had one of the Bimini T tops on my 19CC several years ago. I am a T-top guy, but that is because I fish and do not do much else in my boat. I dont like having anything on my gunnels. I like the rod storage I get up on the top. The trade off is you have to move around sometimes to find the shade.
On the Bimini T top, that was a pretty cool set up on a small boat. It let the top be removable but offered some shade. It held up very nicely for the 4 years I had it. It was more stable than I would have thought, when running the air seems to strengthen the top. The only draw back was that you had to roll up the sunbrella before you trailered the boat.