To back up what Snnipe 70E said, I have 2 True GDM49 fridges, and 1 True GDM49 freezer. The cabinets look identical, but the working parts are vastly different. For starters, the freezer requires a 220 outlet, powering a 1.5HP compressor vs .5HP in the fridges. The condensing unit is also at least twice as big.
About a month ago, the temp controller in my GDM72 fridge (3 door model of the same line) fried, causing it to hold temperature well below what a fridge should. Unfortunately for me, it was able to freeze the contents (exploded sodas are no fun to clean. X10 if it’s glass bottles), but the .75HP compressor was really being overworked which was evident in the amount of heat coming from the bottom of the unit.