Screening Unlike ICOs, IEOs are required to go through a strict screening process in order to get listed on a particular exchange.
Fundraising platform In an IEO, fundraising process is held on an exchange, while in an ICO, the token sale is held on the company website.
User acquisition In the case of ICOs, the company itself is required to identify and bring investors, while for IEOs, exchange does that.
Smart contracts Being different from the ICOs, the smart contracts are well associated in case of an IEO are managed by the exchange itself.