I used the 209s for 25 years. When they became scarce a few years ago I got the Cheddites. Now that the 209s are "back in business", I went back to using them. I interchange the two and don't pay that much attention. I can't tell the difference when I use either. I did have problems with the Cheddites not going all the way down into the ACTIV hulls. But other than that, I interchange them. I don't know which ones are hotter. Someone else will. Good luck.