The Cold Blood didn't seem to do as well, I have one and it has just been more condition specific for me. I think that is also partially because I went with a smoother layout and it is naturally providing a smoother motion. The cover seems to be too strong at times, but when polished up mine doesn't have enough to make it back. Again I believe that's because of the layout I chose. Really no room to miss for me, if I do a little bit it's hello 10 pin.
I wouldn't be surprised to see the Blood series gone and something new coming in