Grinchy
Permission to suckle
Well Nintendo themselves are telling you that Donkey Kong will be a lesser game than Mario Kart World which isn't that great to begin with. Yeah, Nintendo is telling you that DK is worth $10 less than an open world kart racer.
Maybe Nintendo added the $10 because Mario Kart is an ongoing online game that will require many years of maintenance and patches and stuff.
Maybe they aren't saying the "$80" game is worse than the $70 game at all. I didn't pay $80 for Mario Kart and I don't want to pay $80 for anything (I don't even want to pay $70) but I think it's a huge stretch to come up with that logic that all $70 games are Nintendo's way of saying they aren't premium compared to Mario Kart lol