I would imagine that they would be going to plug in wings on the ones that are currently single designs. If you pull the info on them, you will see that the wingle wing versions are listed as "currently a single wing design". I may be wrong, but I would think that would be one of the major changes.

I have heard some rumors about double beveled edges for more control surface throws. Who knows?

I'm just glad to see them making their models better and offering the older models at reduced prices to clear them out. I hope they continue to do this in the future. Perhaps they will offer better hardware and maybe some different color combos as well? That would be sweet although I must say, for ARFs the covering job was pretty nice (complex) too.

I'm interested in the differences as well.