Glad you mentioned the scroll wheel - while I didn't use it myself - I know a lot of people will miss it. I miss the middle button the most as I had that assigned to voice command - the camera button is not in a handy spot for that.
I won't say it is worked out until I get the credit back for the phone
I think I'd need a lumen scientifically answer your question. My touch appears to be a tiny bit brighter at mid setting and appears a tad bluer than the mogul.