The standard Cavendish banana is the main variety grown for Western markets. It is staple fare in the supermarkets, so there isn’t much variation for consumers. Mainly, you can chose between big and small, slightly less yellow and slightly more yellow, organic and non-organic, different brands and different origins, none of which make a huge difference to flavour. Granted, there are subtle differences (and plenty of claims!), but it is hard to be categorical about them.