I ran an RH450 with an RS212 for years, then upgraded to the RH750. I also had an RS210 and a 112 which I used in various combos. I always found the 212 to be a lot fuller sounding. I’ve never sought the vintage P bass sound per se, but I can say I could get it by adding a pedal if needed (I used a creation audio grizzly bass) which worked really well.