I don't use Skype, but Webex is methodical, slow, cumbersome but never fails me. Teams randomly locks up, sometimes I can't log in. There's no "guest mode" that I can find on Teams. It's a mess.

Zoom just works better for me than either, but I'd prefer Webex to Teams. My last Teams meeting with a customer I had to apologize 3 times then send a zoom because Teams simply refused to authenticate me or when it let me in, my video was not working.