Are These The AAA Williams Cultivar?
 

I'm trying to identify the exact cultivar or cultivars of these bananas. They are the most common type growing and at markets in in the Rio Chirripo area of Costa Rica. I thought they might be Williams, of the the AAA group of bananas.

The taste is similar to cavendish, but when fully ripe they have a hint of butterscotch.

It seems to me that there are actually two different types here.

The longer and thinner ones, seen still on a hand of bananas, taste and ripen a bit different than the shorter, fatter ones.

Neither tastes or ripens like any of the cavendish types I get back in the US.

Any idea?