If you check Kai's earlier pics---2006 and before, his biceps have always looked like that.
That being said, his arms are bigger than Phil's and he has better peaks.
he fits all the criteria for todays bbing,and is freakier than phil,his biceps and I've seen pics pre blownup version he has peaked but short insertions by nature .there is a lot of oil making up that gap previously there,his arms are freaky yes .