I think you just answered your own question again without realizing it. You say that no two of them have the same settings or trim, yet all of them sail faster than you. Hence, it ain't the settings or trim.

Put a bunch of tell-tails on the sail so you can see what it's doing. Then try to feel the boat. Get your head out of the boat. It kind of needs to be like riding a bike. When riding a bike you don't look at the ground right under the wheel. Or look at the handlebars to see where you are steering. You look way out ahead and your body feels and guides the bike. Try to get into the same kind of relationship with your Hobie 16.