These tour issue Callaway MBs are off the chart sexy, I can't find anything about them that I dislike.
The Miura shape gives them such gorgeous lines and angles, the look at address shows an almost scary thin topline and so little offset it'll make a blade purist drool. I especially like the look of the PW at address.
The differences from the '18 Apex MB are pretty obvious from any angle. The head has sharper, straighter lines. The flow from the top line to the hosel is flawless. The extended hosel fits my eye better than a short one. Milled grooves are always a plus. Even the finish looks noticeably nicer just from the pictures.
In my humble opinion these are absolute gems.