From a chat standpoint, the two are near identical - yes - but Matrix lacks the “voice/video calls as persistent rooms” feature that Discord has. This was planned a while back, but has recently been sunset.

Early on Matrix was sort of being built up as an IRC/Discord alternative, but recently they’ve pivoted more towards a WA/Telegram/Slack alternative as most of their financial support comes from European governments and companies looking for strong and secure internal communication solutions they can manage themselves.

So, TL;DR you probably won’t see the exact Discord like features you want land in the spec any time soon as they’re not being funded.

So that means, right now:

• No persistent voice/video rooms (but they are on the roadmap!)
• No push-to-talk or “game friendly” settings like voice auto-detection (also not really on the roadmap)

Having said all that, Matrix is brilliant and I highly encourage people to check it out. I use a Matrix <-> Signal bridge for most of my comms with my friends, and we voice chat on Mumble. Not ideal, but you get to avoid Discord and you get a very similar experience! Bonus points for Mumble as it’s super lightweight.