I don't have any play time with either of these amps. I have only played on the new Markbass, GK, Hartke, Eden, Ashdown stuff. I liked the markbass (LM2 & F1) and ashdown (EVO II) stuff, but don't get a chance to try GB or Yorkie's out. Eden is out of my price range. Both amps are used. I plan on A/B'ing synth and bass into the head. So a head that could handle a synth well is important. I like a presence in the low mids, and a something a bit warm. Nothing to biting. I hear a lot on the GB not much on the Yorkie, but the yorkie is also a few years older.