The difference is that they are extra files in Version A, which seems to be patches to make the game runs smoother according to SonicStation. Whereas Version B doesn't have those extra files in case when Version A doesn't work on certain smartphones.
However, I didn't mentioned this on the presentation because I can't find any evidence about smoother framerates and performance differences between the 2 versions.
It true that I could have leave the question of whatever or not you noticed any technical differences during gameplay, because I haven't.