Wow, Reb, we must really prefer different rubbers for different shots. Even though we both like the R450, it must be for different reasons. I mean, R330 a blocking machine? According to me, the R330 is the worst blocking rubber amongst the Roxon, while R500 is the best. So, I guess you prefer soft rubbers for blocking? I'm the opposite, the harder the rubber, the better ir blocks.
As for the R330, I don't know why, but I liked it a lot on my fh, but couldn't stand it at all on my bh. My only guess is that I play much more active shots with my fh, which might suit the R330 better, then the more passive style I use on my bh.