It is all about the width of your backside relative to the width of the Brooks model. Fit really matters with these saddles. I have tried five different models.

The B17 is too wide for me. I can ride it, but it is not the most comfortable Brooks model for me.
The Swallow and Swift are too narrow for me. These saddles are TORTURE for me to ride. I've tried. I love their look. But they don't fit me.
The Team Pro, for me, is just right. Amazingly comfortable. True long-haul comfort.

If you can, it is wise to buy your Brooks from a retailer who allows you to return it within, say, 6 months for a full refund or exchange, even if used. Wallingford Bike Parts (wallbike.com) does that. The slight extra you pay for the saddle through them is definitely worth it if you're not sure a particular Brooks model will work for you. Their return policy on Brooks saddles sounds too good to be true, but it is not. Excellent service.