I prefer BNB for now. Indeed the high Fees on the Ethereum network are a problem for me doing small transactions. Therefore I think BNB is the best right now. But that doesn't mean we have to switch from ETH because there are indeed many projects running on the ETH network and that (high fees) remains a problem that needs a solution.
The two coins are not the best choice, if you can choose to take action by investing in BNB and ETH so much the better. you can analyze a lot from the two virtual currencies. if you talk about large gas costs you should be taught not to cash out in the near future on the coins you have.