I like Saizou more, something about Kaze just rubs me the wrong way. I actually do like him and his supports, but his personality is just... I guess Kamui's character is way more involved with Kaze then Saizou? I'm just not too fond of characters that don't stand out, not saying that such characters are bad per se, I personally just don't really care about those types of characters (which makes the fact I'm rather fond of Kaze actually surprising to myself).
Also I'm a sucker for scars and Saizou's personality, plus his Charlotte support definitely won me over cause I did not expect any of that. Sorry, Kaze.