Opening Pandora's box here.
As
@thinwater eloquently mentions - there are a lot of variables to consider. In a former life, I guided multiday river trips for many years. 6 to 23 day trips - a few in summer averaging over 100 degrees every day.
Some real world large cooler thoughts. (Talking 150 to 200 quarts.)
How often do you access and how long is the lid up?
How much dead air space?
Extra insulation (ensolite pad on the inside), cooler condoms and sun protection?
What type of ice - cube, multiple commercial blocks or best yet - 1 block frozen in the cooler in a walk in freezer = optimal.
Do you drain or not?
In reality - cooler in question is small enough to stuff in a home freezer and freeze a block solid. I do it all the time with the 70 quart cheesy igloo that came with our H260 and - we have gotten up to about 13 days (with beer in a separate playmate), pre frozen food and anal management.
You won't be doing that with the little Ozark Trail.
River outfitters pretty much have all gone with Yeti style coolers but, as mentioned, they cost and have less interior space due to the insulation. We have a 70 qt yeti and it is awesome. Also a 178 qt Gott which works fine. And soft coolers. And 3 playmates and......
So..........it just doesn't matter.
Ice is cheap - pick your own.