I've tried almost all the non-ceramic Bare Knuckle "Rock" pickups from Mules to A-Bombs but have never tried the Riff Raff. I imagine they are like Mules with a bit more bite - is this right? So, if you could please tell me all about Riff Raffs, that would be great. For reference I have used Mules, VH2s, Rebel Yells, Crawlers nd Alnico Nailbombs, so any comparisons with these would be particularly useful.