iui vs ivf

So, have been ttc for almost 2 years. Went through 4 rounds of clomid. Next up we are supposed to start iui. We were supposed to start in March, but because of Insurance and them wanting more tests done, it’s being pushed to April. However, with all the reading I’ve done I’m wondering if I should go straight to ivf, since it has higher success rate. Can anyone share their experience with iui or ivf and how many rounds you went through before becoming pregnant