Well if I had to absolutely take a pick then probably ETH. Although now what with the POS testing trials I am quite wary of ETH. My true honest answer would be neither at current time and never BNB just because of its quasi-centralization. I would not want to hodl coins that are even the slightest centralized.  At least the old Ethereum was decentralized. Now with POS it has already proven that its not really all that centralized either. Not with half of the nodes being owned by a literal couple of individuals. Seems dangerous territory to me.

Basically old eth over new eth and eth over bnb.