Last year on a hunting trip to Maine in October a member of our group had a new "YETTI" cooler. He had been out there beyond electric power for about two weeks and his cooler still had about 90% of th...
I have both the Coleman Extreme and a couple Yetis. Sorry, the Colemans are not "close". I've gone 12 days before the ice melted in the Yeti while rafting the Grand Canyon, with highs over 120F and lows maybe in the 80s on the cool nights.
If you only need a weekend or car camping cooler, then yes the Coleman Extreme will work. But its still not a Yeti.