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.