Yes, Mini 6 bezel looks thicker... but how much thicker? In that albeit
subjective view, it looks maybe 2mm thicker. Allowing for photographer-to-device position differences, I'm speculating up to maybe 5mm difference. Thus the idea of could they have shifted the new screen (with "extra") down that much to have 1080p FaceTime and no notch?
If they fit a 1080p FaceTime camera in both devices (possibly the SAME 1080p camera?), I don't think the MBp screen must be any thicker than it is. Just do that part the same way they did it. Mini is thicker because the whole computer, battery (and keyboard

) is in the screen (and the camera module on the other side). I don't think the bezel size has anything to do with it.
Mini 6 1080p camera looks CLOSER to the top of the screen vs the 1080p MBp camera looks in these Apple pictures... which implies that the MBp camera could have been positioned as close in this MBp, instead of shifted down a bit to presumably center it in the zone between top of bezel and bottom of notch. Clearly Apple CAN position the camera higher (because Mini shows they can).
Here's a closeup of MBp vs. Mini 6 relative camera positions...
Now again, there is some room for error here based on distance from MBp and Mini... but judging from the size of the metal rims, I'm thinking this can't be very far off.
So then one can ask, how tall is the notch? If- say- 6mm, look at the relative difference in bezel heights. Would anyone argue it's more than a third? So if notch is 6mm tall, then bezel difference is 2mm. If Notch is 9mm tall, bezel difference is 3mm. One can only speculate this so far. Can Notch be 12mm tall? 15mm? Else, if it is 6-9mm and these pictures are relatively to scale, a whole screen shift down of 2-3mm fits in the "extra" gained with notch, fits the 1080p FaceTime camera fully into the bezel (just like Mini 6) and eliminates the notch.
Is there at least 3mm at the bottom to absorb the shift? Again, looking at Apples own MBp pictures, it looks like there is MORE than that at the bottom.