Similarity in the past. Not sure how true that statement still is, but If Waterloo is still involved (With either Sears or Kobalt) , They have outsourced and the box quality has dropped substantially. I have a Waterloo built Husky, and apparently it was one of the last reasonably well built boxes in the big box three of Lowes, HD and Sears.
The ONLY box I saw on a recent (last Dec) tour of all three, the best of the bunch was a 27" top/bottom Gladiator at sears. I wouldn't consider any of the others, including the "Pro" boxes on display. Sears shows the Montezuma boxes in their website, but I did not see any at my Sears, (and truthfully that was exactly why I went) So that may be an exception.
I also stopped at HF and I had to admit the HF pro level box was impressive. My main gripe with their extra wide boxes is shared wit nearly all the maker/sellers of extra wide boxes. The drawers are too deep, and there are not enough of them for the size.
Square inches matters more than cubic inches for tool storage.
The stack on the OP of this thread is an great example of a good box. look at the bottom box in particular. 9 drawer deep. do you know how rare that is? My husky is 9 deep (11 total count, the top two are half width drawers), and I looked EVERYWHERE to find it. (I was not yet doing much on line shopping then)
Even at that, I'd be happier if the bottom deep drawer were two at half that height...