I wonder if the thinner profile will make it more comfortable in smaller hands (both in terms of reach and center-of-gravity), but I'm skeptical.
It's actually not that thinner (1.9mm compared to 12 mini) so I doubt it will. And it definitely can't make for the huge size difference (134mm of extra width).
Ditto. This adds 10.5mm of width, but shaves 4mm of depth (2mm on each side, as measured when holding in one hand). So the net increase is only 6mm. I won't be pre-ordering one of these, since I want to feel it in-store prior to purchasing.
The weight is also significantly (in percentage terms) greater.