leaving the caseback out of it, the obvious flaw is the date window/font mentioned already. it's also positioned too far left and they've compensated that with a longer 3:00 lume marker. secondly, the "luminor marina, panerai" font looks a little too bold compared to the gen. and in some pics, this model seems to have the latest crown guard lever problem. overall, not bad ... but not great. see below an image of the gen for cross reference ...
p.s. i have a gen 312 on hold at my local ad and will be happy to post pics in a couple of weeks.