I have both varieties and due to the cold climate I do not have problems with suckering. However, if I had to choose 1 I would select Blue Moon. Reasons:

1. The racemes are longer and really pretty and full.
2. The smell from Blue Moon is so much nicer.

Also, if the weather is really nice I have had my BM repeat bloom but not Amethyst Falls. Also, BM is a bit hardier than AF.

Good luck in your selection.

I live in fl and I really want a wisteria which species do you think would grow best here

I live in fl and I really want a wisteria which species do you think would grow best here

Blue Moon is awesome. Like Ladylotus mentioned, longer racemes, and it blooms profusely and consistently every year no matter how cold it gets.