Well, I wear 10W dress shoes and 10 sandals and have a pair of converted TF9 inline skates in 7W. They felt too small at first, but after baking and about 10 hours of skating they feel like the right length. I scan a 7.5 Fit 3 on the Bauer scanner. So, based on your Bauer and shoe size I'd recommend a 7 TF9.
With that said, I wear 8EE Mako II skates. If you should've been in 8.5 Makos then perhaps a 7.5 is the way to go. With the 30 day guarantee, trying either size isn't that risky. Just make sure they're properly baked and you wear them for several hours before deciding if they're the right size.