Thanks for the responses, everyone
I might've made a slight semantics error when I said older (I consider most kits to be new if they were released less than six months ago, but that's me).
I think that I've reached a decision now. In terms of appearance, I think the 00SS/G appeals to me slightly more because of the sheer overkill it has with respect to appearance. That, and the sheer amount of that clear blue on it.