According to Wikipedia, there were 991 -200 frames delivered, while only 69 for -600.
I know for sure I've flown -200 at least once, with one aborted takeoff at high speed (not counting that one as we never got off the ground, and much to my amazement stopped just short of end of runway).
I am pretty sure I've never flown -600 and now that WestJet got rid of theirs, I am pretty sure the odds are very, very low I'll ever get a chance.
C'est la vie .....
It's 747-8 that I feel is lacking in planes I've never flown

Well that and the Concord ......