These two coins are coins that has gotten the attention of the populace, though ETH has been in the system for years and has gained lots of trust from investors, projects and supporters. ETH also has being a solid ground over the years for new projects that are currently doing well in the market. Binance is another good coin that is used for transactions method used in the binance exchange as a major form of trading/transactions with which there is a bonus for its use and holding.
The popularity of binance coin has grown high in a very short time if compared with ETH, and these two coins are very popular as at now. They are two coins that worth holding for the long run, but i will take BNB for now as it is young and ready to run.