You know, I've always wondered is it a netorare game if you play as the guy stealing? It seems like the answer is yes but I think the site should split it into separate tags
It isn't the same, no.
Netorare and netori
(tagged cheating, here) are entirely different in the audiences they aim to satisfy.
Think of it akin to masochism versus sadism.
In Netorare, the perspective of the MC is that of a cuck'd loser whose woman being stolen and plap'd better than they ever could brings them a sick sense of arousal, the shame and frustration is what the reader gets off to in such a case.
In Netori, the perspective of the MC is a guy that sees a woman he wants to bang and her loser/oblivious GF/husband.
Usually the woman is a closet-slut, an open one or is just unsatisfied. The MC gains satisfaction from banging a woman that's forbidden, taken by another, and while both he and she know it's wrong they cannot help but enjoy it all the same.
The reader enjoys the taboo of stealing a married/taken woman and in some capacity the twisted sadism of ruining her for her husband, annulling their sex life such that they're together in name/title alone.
They cater to a vastly different audience in spite of both being brands of "NTR".