I wouldn't quite say the EQ's are similar, at least not to my ears. Having tried both in the same guitar through the same amp, I can say that the C5 has more bass and treble, and less mids. The C5 is also brighter with more output. I didn't like the C5 at all in my guitar, but I've been very happy with the Blues Trembucker. It has a very even EQ with medium output, and it's warmer than the C5.
Bloodrose, are you still interested in buying mine? I mentioned it a while back on the old board, and you said you might be interested. I'm going to have the custom shop wind me a standard spaced, standard polepiece version of the Blues with a cover, to put in a different guitar. I want to try something different in my Wolfgang, and as soon as I get around to rounding off the baseplates on the new pickups, I'm going to take the Blues out.
Ryan