I find the side-by-size comparison photos some of you have posted to be very helpful in helping my visualize the bezel size and mass difference between various models, especially if one of the pics has one of the watches I own.
Here is a Q & D photo of two ProTreks (Pathfinders) and two Gs, for your reference and entertainment.
Notice how the displays have slight differences in contrast: the PRG-40 (L-R #1) and the Gulfman (#2) both have marginally higher contrast displays, making them more legible to my eyes. The DW-5600 (#3) and PRG-80 (#4) seem to my colour-blind eyes slightly more beige or brown in their display's background.
Cheers from Edmonton, Alberta, Canada.