No chance of clips for a while - I'm reorganising my music room (& upgrading some gear) so my setup is in bits at the moment :)
However to answer your question, I reckon that PK might be "tighter" than NB for really fast un-muted alternate picked riffs (which I presume is what you meant?) Bear in mind though that under extreme high gain you will lose a certain amount of definition without palm muting, regardless of the pickup you use.
Also, I only have a Cold Sweat neck (you asked on another post somewhere), so can't comment on the bridge...