IEOs and ICOs are just as risky, but If I had to choose between the two, I would prefer the top IEO in the market because there is less risk of fraud compared to ICOs. The IEOs listed on Binance are successful and have attracted more market investment as well.
Almost everyone on the the topic voted for the return of ICO in case we are trapped to choose either of the two but you. The reason might be the only successful ones who were able to get listed on Binance and thrived. I personally would go for ICO I don't have much explanation but, it actually lifted a lot of capital invested with little or no losses at all.