From experience with many options, and having used zoom for over a year now: Video quality is better, audio quality is better, video and audio are streamed separately and during low bandwidth situations audio takes priority over video (video starts lagging but audio remains as perfect as possible), seamless to join meetings even when youre not a 'user' of their ecosystem, and has neat UX like informing you that your microphone is soft-muted when it notices you speaking, etc etc.
Whenever I've used Zoom from my home connection during the last few weeks, I've experienced laggy, blocky video, occasional audio dropouts (with frequent alert messages within the app to restart the Zoom client's audio), disturbingly high CPU usage, and meetings which take minutes for everyone to join.
Honestly in my experience, there's no real benefit when compared with Skype, Hangouts, or Discord except for the frequently mentioned large 50 person+ video streaming.
