I'm not familiar with the fiver version, but my j style has had the 4 string QPs for a while. While they are beefy, I find the mids and lower mids lacking, and the high end a bit excessive, you have to be very careful on the attack, otherwise they can get clanky (all attack, not much tone on the decay). Good pups for punk, less so for raggea. I bought them for use with a metal band, and they were great for that, especially in series mode, for my current band (zepplin/grunge blues rock) I switched to a P, they just weren't cutting the mix after the attack.
Basically, good pups if you want a heavily scooped, attack oriented sound, otherwise, not so much.
Colorado Club #667