I like youtube music because it's not only the original versions of the songs, it also gives access to recordings from live performances and covers as well, which I reckon spotify doesn't.
the only drawback i can think of for soundcloud is that some of some bands’ (like fall out boy) better songs are pay-only, but i’m certain that there’s a free repost someone made somewhere on soundcloud
unlimited skips for free, don’t need an account for full songs, ads less often and only 30 seconds long max; only 6 skips per hour for free, less ads, (i think) need an account to listen to full songs; has music