I wonder if Panasonic already has a switchable version, why it does not offer it worldwide? Does Pana have to pay some royalties or something for each scanning rate? Don't think so.
Also, the HMC40/45 is 60Hz only, the HMC41 is 50Hz only, not multiscan.
The JVC HM100 and the HM700 are switchable out of the box.
Bound to be software as it would be stupid to make different hardware when a software flag could do the job. Just another way of extracting more cash out of people.