Just want to note the cardsperson might be a little biased to cards there. 🙂
IR isn't just a port and angiogram specialty; it can involve saving lives too (interventional onc and embolizations for brisk bleeds).
But overall I agree that you should pick a field based on the bread and butter. And the bread and butter is about more than just which procedures you get to do. Do you want to be a radiologist or a clinician?
IC is a kind of *cardiology*, which means you're expected not only to do procedures but also to follow patients in clinic, on the wards, and in the critical care unit (although usually as a consultant in the latter two cases). Most radiologists hate that kind of stuff and specifically went into radiology to avoid things like rounding, chart documentation, and dealing with the occasional whiny/behaviorally difficult patient. On the other hand IC docs love it. They feel comfortable running their own codes in the procedure suite (something an IR doc could never do).