OK i'm going to have to STRONGLY disagree with you on this one...
Hear me out.
There IS a difference between these two games — The points of view. In the game "mercy" YOU were the rapist. In this game, you're the victim. And I think that this difference does matter a lot tbh..
You liking someone to do that to you is different from you wanting to rape someone... Something like that. Besides, the audience is also different. Mercy was a game that, in addition to being extremely realistic, supported rape / the creators said they didn't understand what the problem with the game was, the audience was clearly men who would definitely grape someone irl, and a game that in the society we live in, supports misogyny and the objectification of women. It's a much deeper subject than that.
While THIS game is more of a... Something for people with weird fetishes? Like masochism. And besides being unrealistic, I highly doubt that the audience for this game would want to go through this irl. (probably just a grape roleplay or something like that)
Sooooooo yeah . there is a lot of difference, and the impact on society of these two games.