Not a dumb question at all. BB original is lux's "original" poly offering from way back in the day. It's still used quite a bit on the tour by Safin, Gasquet, Moya, etc. I just started using it recently when searching for an alu substitute. I never considered using BBO but NickB spoke so highly of it that I felt I needed to try it...and I'm glad I did. I wouldn't say that it's better performance wise than alu but BBO does 97% of what alu does for only $12 a pack as opposed to $14.50 for the alu. I love alu but just cant' justify the price when I factor in the constant restringing from tension loss, but I'm getting more hours on my BBO as opposed to the alu and that makes a big difference. Plus, it's got that "X" factor feeling you get from lux. Give it a shot, I'd be surprised if you don't really love it...especially coming from alu. It only comes in the 1.30mm size but I feel that it plays more like a 1.25 and it's really comfortable for a poly as well. If I was still using my PDR with an RA of 71, I might have more of a problem with the stiffer nature of the BBO but it feels fantastic in the PST.