pearl to pearl the cobalt is longer and stronger for me, lots of length and big pop on the back. both my dirty bomb pearl and my cobalt were drilled pin above bridge cg out slightly, i had to take the side down on the cobalt to tame it down, whereas the pearl DB needed some more oil (IE I had to chase the oil with it to make it work) cobalt more angular. now if you are asking solid to solid, cant answer that yet, but hopefully when teh solid is released i can update on it