Apart from the obvious travel adjustment do they vary in any other way? Reliability, performance, etc.

I used some on holiday when I broke my RC’s, they didn’t feel anywhere near as good on small bumps, hence I ended up running the pressure too low, causing a big off. Possibly just the set I used, but I have heard similar stories elsewhere.

I have both, the Dual position is nice to have when climbing on the hardtail, however I think the normal fork feels plusher.