Nay and I were actually talking about the platform issue last night. It hadn't occurred to me that the disparity of platforms would leads to more people only playing one of the games, but of course it makes sense. This is definitely the case for Compilation and FFXII/RW, and I think to a certain extent for the Tactics games as well? There are people who have played X-2 and not FFX, but not nearly as many. Same platform, same genre, marketed as a direct sequel (which RW was not).

I wonder if there is a distinction to be made between separate fandoms and separate canons.