I didn’t really like ProPedal on mine, but other than that the Float R is a good shock. The performance of the RP2/23 doesn’t seem any better, just more adjustable.
I suppose it depends what aspect you want to improve.
I have an RP2 and can’t fault it – I switch propedal on and off quite a bit for climbs etc, quite useful imo. I’m not sure if an RP23 performs better, or is just more adjustable. You can have too much adjustment sometimes imo.