We're not sure which parts of this device have been on a diet, but it does look like Apple shaved some mass off the top case.

Could you show us visually the difference if you’ve spotted it?

I've tried everything, heating it up until it's too hot to touch, pressing the knife in the gap straight down, at an angle, nothing seems to work. I've tried using all my arm strength and it still doesn't even enter the gap. Is the iFixit Jimmy not thin enough for the job?