The pickup in the JMJ is a bit special and you can’t buy as an upgrade from Seymour Duncan (yet). Also, the build quality on the JMJ is very good indeed, coupled with quality hardware. My only complaint with mine is that the relic dings are often too uniform and start to form a pattern (nails on a roller type of thing). But that’s only when you start looking up close. Other than that, I’m very, very impressed with mine, even the nitro finish on the neck seems to have been dried correctly (something my old RoadWorn P fell short on) and doesn’t stick to my hand after playing for a while (I have a history of this with nitro including, Gibson and PRS). I can’t comment on the Performer as I haven’t played one. I have played the Vintera version, which was rather good and the Performer should be an upgrade from that (you’d hope).