Hey there, sorry for being late. I don't have PG Blues or Mules, but from my experience with Vintage style BKPs, they all do a farely good Led Zeppelin. Just not too much gain and bass and you get there.
I was really struggling get the stock seymour duncans in my Edwards to get close, but VHII, BlackDog, even the RYs could cope quite well with The Ocean.
I'm sure the Stormies or Mules / PG Blues are dead on too.