Personally, I prefer the usual ico on ethereum. There is much more transparency. And the advantage of ieo is only in the fast listing on the stock exchange.
That is not the only advantage or reason why people are running to IEO, you are not a newbie and you already know what Ethereum ICO is already going through, how it has been destroyed by scammers and has made investors loose interest.
Ever since IEO platform was created because these top exchanges promoting them makes sure they do their own due diligence in ensuring that the project is a very reliable one, many investors have made their ways back to the crowd fundingscheme and still supporting these good projects in establishing it. So ICO and IEO are totally not to be compared.