The three Pioneer DVD drives, DVR-R100, DVR-110D and DVR-111D, have identical electronics inside them. The differences are:
DVR-R100 -- Retail version of the 110D. Comes is a pretty box bundled with several programs from Ulead (DVD MovieFactory, CD & DVD PictureShow 3 SE, VideoStudioTM 9 SE DVD, and Photo Explorer 8.5SE) and NovaBACKUP 7.1 and a owners manual.
DVR-110D -- OEM version without the fancy box, software, and manual.
DVR-111D -- OEM version with a different case from the DVR-110D.
Pioneer's Knowledge base article F10545 says, Pioneer does not manufacture any "multi-region" DVD players. Also the DVR-110D owners manual clarifies this by saying, "The region code can only be changed 5 times, including the initial setting. Please be aware that the fifth change becomes PERMANENT. Therefore, avoid changing the region unless absolutely necessary."
Perhaps what they were thinking of in regards to the DVR-110D being infinitely re-settable is:
1) Hacking the firmware to make the DVR to have FREE region Code. This voids any warranties.
2) While region codes are part of the DVD standard, DVDs do not have to have them.
3) The region code on the drive applies only to playing DVD Videos. The drive doesn't add a region code to the disk when you burn one. It is your authoring software that provides a method for adding one.
Bob
Power Macintosh G4 MDD / iBook 14.1 Mac OS X (10.4.5)