Well, of course TOS had many episodes where the science was awful! But it was a space sci-fi show and the quality fluctuated.
Of TLZ's stright-up sci-fi episodes which had good attention to science detail-or even cared?
The Little People
To Serve Man
On Thursday We Leave for Home
Will The Real Martian Please Stand Up
Serling was telling morality plays--not even trying to do real sci-fi.
TLZ may well be a better TV show, but better sci-fi--I don't think so.
But does that really matter? I guess I just don't see why that's worth worrying about. I watched both shows for the stories, not the science.
Science fiction, fantasy, horror . . . it's all the same to me.