Fitaly versions

This may be a dumb question, but why are there 2 different versions of Fitaly for Windows? (Fitaly for Tablet PC, and Fitaly for Windows, which I presume would also run on a tablet PC.) I know Fitaly for Tablet PC is not yet for sale, but when it is, I'll be confused as to which one I should buy for my Tablet PC. I agree that Fitaly for Tablet PC could be sold as is, but I don't really understand the difference between that version and Fitaly for Windows, and which version is more powerful or best suited for Tablet PC. I'm a long time user of Fitaly for Pocket PC, I just added a convertible tablet PC, and I like having the same input method for both platforms.