If you are asking the community which one is better, IEO or ICO?
From my end, in the current scenario, it is better to hold IEO on a reputable exchange.
ICOs have been ignored lately, as most of the potential investors found out that after ICO, they can buy the coins in exchanges at a very cheap price.
However, if you want to tie up with a known exchange, make sure that your platform has solid foundation also.
Otherwise, people are now smart on checking a project. If it is only because of the hype or not.
I do not appreciate the IEO because it needs to co-operate with good exchanges to fulfill the goals set forth earlier. With that, the development team needs to spend a large amount of money on the exchange before releasing the IEO.
ICO is not as hot as before but still attract investors because there are many potential ICOs and you cannot buy cheap tokens when listed on the exchange.