The Curelyon Pearl Reactive was made about 3-5 years back, Storm then went to the Accutread Reactive. Storms latest reactive realease is the Monsoon.
If you want to compare pearls, the Curelyon would be the weakest, the Accutread the strongest and the Monsoon would fall somewhere in between.
I have all three coverstocks in my bag. I have a polished Hot Shot which only moves as much as I put into the ball ( hand / fingers ). I use my X-Factor when I need a stronger move on the back end. I also have the XXX-Factor, but rarely use it.
Speaking of the XXX-Factor, I was disappointed with that balls performance. Was lead to believe it would be stronger than the Original but it is way milder. But to each his own. I plan on dumping it on Ebay in the near future along with a few other balls I no longer use or need.
I was planning on getting a Banshee because I loved my Original Eraser which was a Accutread pearl. But when I saw it was a monsoon I changed my mind. Hope I was helpful.