I have had a Mk1 and still have a Mk2, mine is blinged, as the frames do polish up very nicely! (its on www.bobsairguns.com )

But I have only seen the new version in pictures. The design looks the same although the build techniques are different presumably to save cost. The castings on the originals were more machined than rough cast, that breech block is typical, on mine its a precision machined item, on yours its cast, and the frame is the same.
I'm only guessing but I would suspect the differences would be felt on the trigger, the originals can with care be got to be quite sweet, if the bits you can see are rough then so may be the bits you can't.
With what I've seen of the new one, I'd advise to look for a good condition MK2, it will likely be better quality and cheaper.
Good shooting,
Robin