If you seen how ridiculous Gremlins 2 was this shyt will make you cry
The show definitely benefited from the Chappelle show. From Dave's perspective they were doing his show, but I think that's more in reference to the behind the scenes shyt. They accepted the deal he refused. The timing, promotion, production and format of the show is definitely directly taken from the Chappelle Show.
The humor however is different, and Key and Peele had some funny ass sketches. I don't think they ever tried to imitate Dave's style. I think they played up the half white shyt in the beginning to differentiate themselves from the Chappelle show but at the end of the day their jokes are what made theme different.
I loved both shows for different reasons
Key and Peele: good at acting and getting into character. Jokes fall flat because they're more Saturday Night Live sketch comedians instead of true stand up comics.
Chappelle: great at telling jokes, solid skits but not really an actor. His skits worked because he was funny, not because he got into character.
Shyt was flames, there's no skit show ever that had a 100% rate.