ETH is my choice if OP wants to compare the potential of the specified coins. Changing the investing strategy may change the invested coins but BNB always will be a good choice among the cheap altcoins.
If we talk about potential, we really can't compare easily because what we're talking about is the future that the coin can grow, this is something that we have no way to accurately identify, instead of looking at the future too far, I think you should look at reality. And the fact that BNB is a better and more perfect choice than eth because trading volume is focusing a lot on binance exchange when binance updates a lot of very promising features and suits traders' wishes, the light of BNB has covered all, eth is very bleak, so the best option would be BNB this year