I think that is right if IEO is much better than ICO because IEO is handle by some exchange that mean IEO have a good security and bring the reputation of thet exchange.
I am still worry to join ICO for this time, it look like still have a scam project.
IEO is no doubt a notch higher than ICO. though the credibility and success of the project are still not guaranteed for IEO projects, yet you have the assurance that they will be trading in that exchange. you should be careful in investing IEO projects and in what exchange? still scammers are everywhere and IEO launchpads are not free from those scammers.
better or not according to personal taste and maybe you think IEO is better, and maybe there are some who say ICO is better but now there are things that are not good.
everything is good if we can do it well, and not all ICO projects are bad, there are still good projects that can be produced if we can find them.
so still we have to be careful what will be chosen because all have risks.