https://vgcollect.com/item/115944
I was quite surprised that there's a separate release of this one for the Benelux region. I'll have to add the European/UK release. But the picture of the cartridge in this entry definitely IS the European one, so that should probably be removed from this entry.
BTW: Is there a reason for having separate regional codes for Benelux (Belgium, Netherlands, Luxembourg) and the Netherlands? It does seem a bit redundant to me.
This game is too new for me to research the regional differences. You will need to post a comparison of the two different carts, and say which is which and which should be on the entry.
Benelux was added into the DB primarily for non-Nintendo releases which had general Benelux releases. Nintendo is way more spread out on the regional spectrum than other console publishers. FAH suffix item numbers with orange triangles, specify mostly the language and not the region specifically. FAH is French/Dutch and is usually the Netherlands release. There is also HOL (light blue triangle) which is Dutch only.
So we can be sure that HOL titles are [NL] and then what would FAH actually be? Should they be [BE] as is, and not [NL] at all, as you say one is inclusive of the other? Or should all FAH be marked [NL] unless a HOL release of the same title exists, then the FAH becomes [BE] and the HOL becomes [NL] ?
For sure, this topic should be discussed and agreed upon by collectors of these games and people who actually live in this region.