I would love to hear from somebody that actually played The Last of Us and The Walking Dead, and genuinely believes Clementine is a better character than Ellie.
There are about 20 minutes in Episode 3 and 30 minutes in Episode 5 where Clementine is an interesting character. The rest of the time she's just a cutesy little girl for Lee to take care of. Ellie is an actual character who develops and doesn't rely on "I'm just a naive little girl" for sympathy.
Yeah, I guess if your criteria is literally just "adorableness" and nothing else then Clementine would be a better character, but by just about every other metric Ellie is the superior choice.