For those who are interested here is a comparison of the 12oz IHSH-274-IND and this 8oz IHSH-366-IND:
Do I regret owning both? No, they are different enough; I really really like the insides of both, which are visibly on display when the sleeves are rolled up. If I could only buy one I would have to pick the IHSH-366-IND due to it's weight and hand.