Both coin had it's own potential.After Ethereum made some changes on fee for the transaction,the new technology was tried with bsc.The fees through the bsc was nearly ten times less than Ethereum.Nearly 60 percentage of transaction was made through the bsc.Even the usdt transaction was made through the BEP20 address and not through the trc20 address.Polygon had the good investors as like BNB and soon get good base in market.