They get cold from the steel toe other than that they are a great boot I use danner. I may be wrong but I thought the army and SF went to a danner in the end.
I have had a pair of the leather snake skin boot for years. They are too top heavy and sag. This causes the leather to rub on the back part of the ankle which causes blisters. They're good boots, other than the leather sagging. I haven't tried the kevlar.