It is.
OB-1 is super smooth and round. OB-Xa is kind of edgy. Matrix-1000 is kind of flat and one dimensional. The OB-1 and OB-6 would be as good for trance as a good Moog would be (i.e. not necessary but a good complement to a Virus). I knew a few trance producers that used the Matrix-12 or Expander.Personally, I always find the Oberheim sound to be very "samey," not that its not good, just that it seems to add a very distinct "Oberheim" flavor to all its sounds. great for film scores and that sort of stuff, but maybe not the first choice for "trance music" which is what the OP is into.