I am a DO student and matched this week. I definitely advise against taking step 2 as a DO student. Every classmate I know of that took both did worse on step 2 than step 1, including myself. I think this has to do with the relative quality of 3rd year rotations most DO schools have (especially if your school uses COMATs instead of NBMEs).
Most radiology PDs only care about step 1, and if you do worse on step 2 than step 1, it WILL hurt you, particularly if you fail. If you did well on step 1, then adding a good step 2 score will not help you much because Level 2 is what you need to become licensed anyways. And to DO's who did poorly on step 1 (<220), you are at high risk of failing step 2 because it has a 17 point higher passing threshold. Many US MD students don't have a step 2 score in either when interviews start going out, so not having a step 2 will not hurt you in getting interviews at most places. Just make sure you have passing Level 2 CE and PE scores in before ERAS opens up in September so programs don't have to wonder if you will be able to get licensed.
Only take step 2 if you are willing and able to put just as much time into it as you did for step 1 and are sure you can at least beat your step 1 score. Also, don't use Level 2 as a gauge for how you might do on step 2 because COMLEX is so poorly correlated. I know of people who did 50-100 points better on Level 2 vs Level 1 and then dropped points on step 2.