In my opinion, it is important to evaluate the practical use of one or another solution. And kinda evaluate whether the one is valuable. + evaluate the industry
I think you need to know about the project on the back of ICO, the greater the project, the more efficient the ICO would be and there could be gains of value like what had been happening in case of IEO. I would prefer IEO over ICO because of many reasons like profitability and liquidity and many other reasons as well. In addition, the project on the back of IEO is checked and evaluated by exchange.