I've heard that these boots are identical so my question is one them warmer or more comfortable. I hunt in Iowa so the weather can get pretty cold and I need a reliable and warm boot for sitting in a tree stand during bow to late season muzzleloader. I've done a little looking around at the arctic shield boat blankets and saw that some folks just wear these and some hand warmers as soon as the get to their stand. Any help on what boats I should go with ? And also if the artic shields are worth buying?