The IUI process is easier from a technical point of view, as no surgery or special medical equipment is necessary for the woman to be inseminated. It involves freezing the semen sample, thawing it for being use, and placing the sperms inside the woman's uterus.
On the other hand, with IVF, the oocyte is inseminated using the donor's vial, which have been thawed previously. Despite the use of donor sperm, the process does not differ from the conventional IVF process. The last step involved in embryo transfer (ET).
The fact that IVF is more complex has an obvious influence on the cost of the fertility treatment, which is higher than IUI. Visit the following post to learn more about it: What is donor-sperm IVF?