I looked at several sites and the B&G site. There was no evident difference in feature that II could decern. While there were price differences it looked that these were site based not the product based. I saw both the 7 and the 7R listed around the $769 price.
I am wondering if this FAQ answer may be the issue.
Owing to differing certification, taxation and import/export regulations around the world, Navico MFDs are intended primarily for use in the region in which they were purchased.
If you imported your boat from the Americas or bought and fitted a unit whilst in the region, please contact your local Navico service team to discuss removal of the geofence.