They're both on topic as I see it. They are discussing the design and making jokes about how the design wants to be some other more desired design or character. I guess it's like discussing different models of phones.
Seen them in stores at my local pharmacy, only girls ones and they were only on size 3T-4T, the other sizes were still the old ones, I guess they will have packs of the new ones very soon, and that reveals that the 3T-4T is the size sold the most in my area. I know for boys its the 4T-5T for sure since they are frequently out of stock, in many stores and pharmacy in my area and they have plenty available for girls.