Hi, this is a re-package of some of the parts of Alex’s custom component. There are definitely differences, but also a lot of similarities.
If you are already using the custom component, and are happy with it, i’m not sure there is necessarily a big reason for you to upgrade.
Alex’s custom component downloads the go binary RTSPtoWebRTC on the fly, uses custom lovelace cards I believe, and has a bunch of great compatibility with more network setups using MSE.
The integration rtsp_to_webrtc is a core integration so its less likely to break on new releases. It “overrides” your existing camera entity and stream, and replaces the it with the home assistant standard WebRTC stream card that is native in home assistant. This is the same webrtc mechanism used for other integrations like Nest. The RTSPtoWeb server is a bit better supported than RTSPtoWeb, however the integration supports both of them.