it depends on the meetings you want to attend.
Webex is definitely more professional.
Zoom is better priced for personal use.
Both have issues of privacy and stability and are constantly being updated.

IMO, one is no better than the other. They both get the job done.

.... more features? Requiring more training? For the host? For users? Can handle larger meetings?

tia
las

Webex scales better. I attend meetings of 70+ each week on webex, and we have no problems.
Mute all. The host in webex can mute everyone, whether connected by phone or VOIP.
Screen and app sharing is easier, so is file sharing.
Webex works better when the network has problems, like being on a hotel wifi or a rural dsl link.
Integrates better with outlook.

Zoom is fine if you like working under the supervision, spying and control of the Chinese government.

https://www.axios.com/zoom-closes-chinese-user-account-tiananmen-square-f218fed1-69af-4bdd-aac4-7eaf67f34084.html