so IDO will probably only be an option for Defi projects and the like. projects that are less concerned with government regulation will use IDOs, and the remainder will continue to use IEOs as a means of raising initial funding.
DEFI's crowdsale can be launched on IEO or IDO. That depends on the agreement that has already made with the partnership. Mostly of IDOs were running on the swap service platform like 1inch, uniswap, or another swap service.
Both were having the same chance to be a successful project. There's no a lot of differences between IEO and IDO.