Is The Eclipse Half Bruiser Build Really Better Than Lethality?

A lot of people are switching to a more tankier build with more sustain over lethality.

Most high elo zed players seem to be doing the same.

But there is a single challenger zed otp (EUW) that still goes full lethality.

Betrayal.

And he seems to be doing rather very well with that build, so what do you think? Why do you go what build you go? Why do you pick lethality over bruiser or vice versa?

I wanna know your thoughts.