Vortex can be swapped between the two shift modes.
Had them on our race bike over the weekend:
My only gripe with them is the design of pedal attachment/mount.
They use a machined threaded spacer that runs through the bearings from the inside & mounts the pedal to the rearset with an M6 bolt from the outside.
The problem is that the spacer doesn't have a hex on the back of it, so you can't fit a spanner on it to tighten it.
Basically, even with threadlock we had both of them come loose throughout the day and affect the shifting performance as the pedal became sloppy.
Hence why I will be fitting the Gilles reverse shift pedal.
Overall they are pretty good and do offer good adjustability.
However I also have a set of Attacks waiting for when the bike is back on the road, as they are pure sex compared to the Vortex.