This is the Miyazawa Model limited version, with just 150 units produced and released.
The one on the right is the new head design.
The content is basically the same with the regular version released in January, but this Miyazawa Model limited version will come with a new head sculpture and altered painting scheme.
March release, 25,830 Yen (inclusive of tax). The price is 1,000 Yen more expensive than the regular version.
All images are from Hobby Search.