>>23562469
This is before factoring in stat boosts and vigor
Char gets 15% boost passive, 15% series boost, and an activated 20%
Zeta has 20% boost passive and a 15% series boost
So that's a 50% boost vs 35%, at least on paper
There's also the weapon power boost which is 20% on Zeta and and 17% on Char

I could be missing some fucky interactions with stats but I'm not seeing now that 15% boost difference manages to both bridge the gap and surpass it in a meaningful way