It's so damn hard to tell unless you have all 3. It seems like ZF is overdone and KW not enough. Again the position of the watch in these shots make them very difficult to tell. I believe the same goes for the crystal distortion. Honestly I don't think you can go wrong with either one of these.
You really can't go wrong with either, but you might be able to go "more right" with one of them.
![Wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
They're certainly not making it easy to determine the "more right" one though. As far as we know now, it's just a matter of which set of flaws you'd rather live with between 2 totally different sets of flaws. I've been leaning towards ZF though due to lesser crystal distortion and the starbursting effect on the back plates, the 2 flaws that stand out to me the most. There's a lot of CP police out there though, and there's no doubt the KW wins that contest lol. I think I'll reserve final judgement for after I see the pictures you take. Thanks in advance!