1. Listing means that a listed company goes public on the corresponding stock exchange and obtains funds by trading shares with investors. Backdoor means that unlisted companies use the shares of listed parent companies for financing and listing, so as to realize the circulation of listed companies' shares in the market.
2. Listing needs to meet more conditions and requirements, while backdoor can be listed only by meeting relevant regulatory conditions.
3, listing can directly get cash, while backdoor can get funds in the form of stocks.