I'd say, at best, it's a 65:35 for Lev and at worst it's a 80:20 Lev.
Lev was a great team last year, retained their core of Kingg, Shyy, and Taco. Adding the best two LATAM players (outside of their previous roster) in Keznit and Mazino (who carried the shit out of Kru through the teams lifetime) just makes them stronger. Even if Kez is a 6th man, it's still nice to have him. Nzr was solid for Furia over last year and at champs, so he'll do well.
Problem with Zeta is that a) they run off vibes and b) they had a lot of stock in Chamber. Laz on Chamber was insane, and did tons of heavy lifting for the squad. When Zeta were winning, it was from Laz on Chamber. That's gone now, or it's at best a shell of itself.
TLDR: Zeta chamber is gone and Lev got a stronger roster, 70:30 for Lev to win.