Um, I wouldn't pay attention to them then man, cause they're hilariously wrong.
To fully explain it, using their translations to english (yeah, NTR/Netorare doesn't translate to cuckolding despite what some MTLs may give you):
Netoru is the root word, meaning "To take". Netori and Netorare are their own independant words built from Netoru. (which are also used as genres)
NTR only stands for Netorare, which includes Netorase because Netorase is built from Netorare, i.e. a sub-genre. (basically think NTR to mean NeToRa, to keep it simple.)
The Rare, making Netoru into Netorare turns it into "To be taken from." (with rase being that, but MC is either causing it to happen, or a willing participant in them being taken from).
This is why it doesn't mean cuckolding, because it isn't specific to husband/wife relationships, but MC having any connection.
While the ri in Netori, turns it into "To take from."
As you can see, the terms have nothing to do with gender, methodology, race, species, level of relationship, etc.
Some say BSS and NTR are different, which for segregation of genre, sorta, but BSS is a specific type of NTR.
There is some confusion, because of a "Three types of NTR" thing, which vndb uses, but all are Netorare, type A,B,C. Cuckolding/Rape/Mindbreak to put it simply.
p.s. don't ask me why f95 adds jealousy in their definition, maybe cause vndb did? but it is not required at all. nor is it in the words to begin with.
Bonus: Netono, where the "no" basically cancels out, and just basically means vanilla.
Reverse-NTR: where MC is the one being stolen. (keen eyes will realise that Netori is also a reversal of NTR, where the reversal is MC and the person stealing, while Reverse-NTR is MC and the one being stolen).