I've used:
- 5.10 impact low = 5yrs+
- Freerider vxi = 5 rides [when sole started to come unglued]
- Freerider Elements - 12 rides
The Impacts have the stickiest sole, bigger, bulky shoes and moderately stiff.
xvi were nice to look at, lower profile, not as sticky as the Impacts, but not bad. Mine started to come apart after a few rides. I could have gotten a new pair, but I didn't love the fit compared to the Impacts, didn't find they repositioned on the pedal any better and the bald sole seemed like a worse and worse idea the more I thought about the shoe as I live in PNWet.
I ended up trying a pair of Freerider Elements [photo at top of post]. They are stickier than the xvi's, but not quite as sticky as the Impacts. Less stiff sole and lighter/lower profile than the impacts. Very comfortable and very walkable.
I haven't worn the Impacts since I got the Elements. I think If I could only keep/use 1 pair I'd stick with the Impacts, but I like the Elements enough to buy another pair.