When I first saw the noew Honetime, I was hoping that JLC adopts this case for their new releases, and that's what they're doing, now, with this new Master Chrono and the new Memovox.
So, the case is an excellent point, IMO.
The case back is not a big deal, to me...Sapphire or not, it doesn't really matter, as both have their pros and cons.
What is more important and interesting is that this Master Chrono has Homogeneity.
Compared to the Omega you've showed in the picture, the JLC is more understated, if you compare the 2 dials.
When I see the Omega, I would also have loved to see a blue pulsometer scale, on the JLC.
But, here again, not a big deal...
Best, my friend.
Nicolas