...Here's my pro/con list for Haruhi vs. Kyouya. xD
Pro-H: Already have most required stuff. Still need patch and roses, but I'd need to get those too if I was Kyouya, plus for Kyouya I'd need to get other stuff like a wig and glasses and other props. Wigs are a bit expensive... Yeah. I'd have to spend less money to be Haruhi (lol, how fitting).
Pro-K: There seem to be a lot more Haruhi cosplayers than Kyouya cosplayers.
Pro-K: I don't know for sure, but I think I might look more like Kyouya than I do Haruhi. (The face part of me.)
Pro-H: My height is more suited towards Haruhi than Kyouya.
Pro-K: We all know that Kyouya is the mastermind behind the club, and I am in charge of this thing. That would be fitting.
Pro-H: I don't know if I could act like Kyouya for that long. I might die. xD Haruhi is way easier.