Yes, in general there should not be 1 entry to handle multiple variants.
The only time that we would allow an entry like that is to handle variants that are beyond the box and cart.
For example, when I was researching all of the Genesis variants, there was some releases that had the same box and cart, but had different inserts. Where there were two releases but the only difference was a different poster or a different registration card. Also some where same box+ cart but could be color or b/w manual. This is why there are Genesis variants on the spreadsheet that aren't in the DB. It is also why many of the EU releases for Mega Drive games are not in the DB, where the only difference between one country and UK release is a different manual... or an additional localised manual.
When it comes to variants, typically like to stick to the variant revolving around the box or the media itself. If it is something besides those two things, then it doesn't need another entry.
