ICO is taken care of more by the developer team so that the potential of the team to fetch funds is huge while in IEO, the proceeds from the sale of tokens are stored by exchangers and the listing process is fast. Indeed for investors, IEO offers security because the exchanger has verified the project and the existence of its team
The aspect of an exchange verifying a developer and existence of the team is what I really don’t buy when it comes to other exchanges carrying out IEO other than Binance and the other top exchanges. when it comes to verifying of team, the only way to be certain of them is when you know their location, their identity and know how to get to them at any time physically which I think only binance does for now because they have the resources to do so.
I am sure that binance would even have a team that can travel physically to confirm the location of these projects when other smaller exchange does not have the resources, and all they still do is same thing like us, by using their whitepaper to judge them, which is the reason you still see some bad IEO projects.