****, didn't read the context. my b
Anyway, the main difference there is that Toby Fox has shown he's a competent developer, and Undertale is proof of that.
Unless I'm mistaken, Kojima is one of those "famous because he works on X series' kinda developers", similar to some of the Pokemon devs like Masuda. Nothing in Kojima's list of games he's worked on really stand out to me, tbh.
And I know what you're thinking right now, you're gonna say "But just because Toby Fox hit it rich with Undertale, doesn't mean his games are good!"
My point is that just being a famous dev doesn't necessarily mean your games are good; You have to prove that yourself.