All my coolers are Rtic coolers.
As far as ice lasting longer then a yeti I doubt there is any difference.
Yeti coolers are smaller then Rtic when comparing same size that is listed.
Rtic are considerably cheaper when comparing to a yeti.
Like others have stated block ice, frozen jugs etc all last longer in a cooler then cubed ice.
How long ice last depends on how often the cooler is opened.
Pre cooling does help ice retention. I think that goes for any cooler.
I have had ice last over a week in an Rtic cooler but I am only opening the lid once a day.
Rtic likes to run deals so if your patient and get on there email list you can get a deal.
I got 25% off on my 145 quart and only paid $140 for my 65 quart cooler.