There are numerous items that affect a tow vehicle / trailer match up. What one person is towing, may not be the same as what another can tow with the same make /model vehicle.
Depending on installed options, tow capacity varies from one vehicle to another. They could be same make and model, but, have different capacities. When you go looking at vehicles, check the tire and loading sticker on the drivers door. You will see different numbers for what each vehicle is rated to carry. This also affects what the vehicle can tow. A 5500 lb trailer will take 8 - 900 lbs out of that number on the loading sticker.
There are differences in family size and the amount of stuff the operator carries along. Take two tow vehicles that are exactly the same, the one with a smaller family and less cargo, could tow more trailer.
There are differences in the amount of cargo people load into their trailers. One family may carry 800 lbs of stuff, when another is carrying 2000 lbs.
There are differences in where people are towing. Short, flatland trips or crossing a mountain range.
18 Nissan Titan XD
12 Flagstaff 831FKBSS
Wife and I
Retired Navy Master Chief (retired since 1995)