My Reba Team (120mm with 20mm Maxle) have been the best forks i have ever had the pleasure of riding. Super plush and awesome lateral stiffness.
I believe the dampers are the same (but am happy to be corrected!). The Rebas are heavier but i imagine they will have less 'flex' than the SIDs, although the new SIDs are meant to have banished that 'light but flexy' tag (although i havent had the chance to ride any yet).
what happens if the wheel is removed? does the lever move more? You should be able to squeaze the brake lever to the handlebar and see the pistons/pads move out. If you try this bare in mind your going to have to push the pistons back in with a pushy device (make sure u dont do what i did and crack a piston )
When the wheels in, when pulling the brake lever (even tho it only moves a tiny bit) does it stop the wheel?
My Elixir CR's are fine, now if i can just get a Dialled PA frame that allows me to mount the rear brakes without them constantly binding to the disc i will be a happy little smidge