As we know BNB is growth so fast in this past few years
bnb with its bsc keep getting more and more demand for tokens in bsc, also the recent project like nft that make bsc become more and more precious because of how many project will need bnb as a fee to pay for their project to run. maybe it's what make bnb feels better and how it is also developing rapidly even many people think that bnb can become bigger than eth. i feel bnb is suitable to be compared with eth or cardano instead.
Yes new projects mostly used BSC as their smart contract because it easy to make and the speed of the transaction is fast followed with small transaction fee make BSC really dominated new projects for right now. Some also used ERC-20 (ETH) but not as much as it was. Litecoin don't have this kind of big ecosystem like BSC that's why the growth is not too fast