Same travel etc, what is that actual difference as both are 32mm (I think)

Reba are usually 100-120mm travel and have the RL damper.
Revelation are 130-140mm and have the RCT3 damper.
Both 32mm stanchions.

They’re not the same travel though. Whilst you can get both in 120mm versions, the Rev is essentially a 150mm fork that’s been spaced down to 120mm. Whereas the Reba is a shorter travel chassis that comes as 80mm / 100mm / 120mm. There’s not a lot of difference in weight, but I’d be surprised if the Revs weren’t a bit stiffer at the same travel.

I’ve got some 120mm Reba RLs and 150mm Rev RCT3s. They’re about the same level of stiffness (not startling!) and the Revs seem to blow through their travel more readily.

That said, I’ve just sent them back to Fisher via TF Tuned as I think the air seals blew a week or so ago: nasty bottom out clunk, pumped back up then a week later the LH Stanchion seal blew up the shaft….

The 100mm Recons are the stiffest of the three 15mm Rockshox forks I’ve got (got a couple of QR Recons too). The old Float 32 RLCs I’ve refitted whilst my Revs are in the ‘shop are stiffer than the much newer Revs.

I think if you want proper stiff you have to go Pikes or Float 36s.