Here is the place to go to get any answers regarding FootJoy. There is a chat line on their site which has qualified specialists all your questions. Some of them are actual members of TT: www.footjoy.com

But being knowledgable, I was address you inquiry.

The new Fuel SPORT comes in a mesh shoe versus the synthetic leather on the regular Fuel shoe. You now have a choice. Same fit same warranty. Spikeless with a pattern similar to the ProSLs. One year warranty.

The Hyperflex new colors and additions. I would recommend the Carbon. Better support. You can get either in the BOA if you are not into tying your shoes. Two year warranty.

There is a third option. Superlite XP. Synthetic Leather, lightweight. Least expensive of the three. One year warranty.

All three would fit the same and provide good support for a walker.

What are the Tour Bs you are referring to?

I might add I have the ProSLs and love them. Guess it all boils down to, do you want a spikeless shoe or one with spikes.

I know I'm a little late to the party on this reply, but for what it's worth the Pro SL Carbon's are super lightweight and perfect for walking. I have two pairs and love them. I was used to the sneaker style shoe with another brand we do not talk about so I wanted something a little more traditional but just as comfortable. I don't think you could go wrong with the carbon models.