The problem with most of these “discussions” is that the comparison is being made on just the towing capabilities when the reality is very few vehicles are being purchased as just a tow vehicle. Most, especially 1/2 ton PUs, are being purchased because they can “also tow”. What percentage of mileage will a 1/2 ton PU be used as a tow vehicle? How do these two 1/2 tons compare in real world uses (main uses plus percentage of time “also towing”)? What percentage of total mileage used for towing is needed for the Tundra (13mpg city/17mpg highway) to “win” vs the Rivian (73mpg/66mpg equivalent)?