I havent had them both in BW, but have in swamp ash with oh $% it heres a link
http://www.legraguitars.co.uk/mdv602.htmDifferences:
The painkiller is:
Tighter
Brighter
Middier
More forward and defined.
The Cpig is
Heeavier, more lows (my PK is double screw as well, and the C-pig was still heavier).
More compressed (by quite a bit)
Hotter
Both are great, but I like the PK best. Its clearer, tighter and cleaner and I love its midrange (I'm not normal such a big fan of a lot of mids: I am of the PKs), they're amazing, they even make nintendo-y sweeping sound somehow big. Love it. Great.
From your style, I think you should get a PK without hesitation.
Your only problem will likely be the same as mine.......every now and then the thought will occur to you that all your guitars will sound better with painkillers in.....