Actually, and I'm not sure why I didn't of this earlier, but you can just keep the trophies the same size and fix the problem of space. You know how much points secret achievements are worth so there's no problem in knowing how big a trophy is.
I still think it would be a funny deal rendering two different things in the same place for two people but we'll see what they do. I suppose it just means you have to have two textures loaded for every secret trophy.








