I love my ceramic Nailbomb, it's a fantastic sounding pickup. It has that great Nailbomb clarity but with more power and focus. Ceramic magnets are far more efficient, so the bass tracking is a lot more accurate than with alnico magnets, giving a tighter low-end. I asked Tim, and apparently a ceramic Nailbomb resembles a hotter Cold Sweat.
However, you could never call the standard Nailbomb loose. It is still a very tight, but is more open sounding and has a more midrange. If you want to retain the midrange, but want über-super-tight bass and amazing clarity, you should have a good think about a Painkiller.