ETH cannot be compared with BNB not even in rarest dreams. ETH has a fight with coins like Chainlink or something. BNB is altogether different. BNB's success is altogether dependent upon the success of Binance as an exchange and nothing else, rest everything is a hoax. Moment Binance begins to lose its market share BNB will start falling too. BNB's value is generally maintained using those coin burns that they have every quarter or something. Apart from that there is no utility that BNB provides. While ETH as of now has been the most useful platform. Not only it supported that token wave alot now it's supporting the deFI wave too and expected to create a renaissance using smart contracts too. But the problem with ETH is that it won't remain a utility coin if it's price goes.

Here's the issue: In every smart contract transaction a certain amount of ETH is spent. Whether it's the creation of that contract, execution or anything else. Now in ETH terms this might be like 0.001 ETH but if the price goes to something like $500 this fee would come out to be $0.5. Now this still looks pretty low but for an automated platform these types of smart contracts will happen almost every second. Therefore making it pretty hefty for anyone to use ETH as a smart contract platform. This problem is so far solved by Chainlink. ETH's utility isn't in sending payments to each other.