Useful comparison. A hybrid setup, with AV1 where supported and H.264 as the fallback, is the practical route for live streaming today.

At Ant Media, AV1 plays natively over WebRTC in modern browsers, and adaptive bitrate transcodes it to H.264 for HLS/DASH and for browsers without AV1 support. Our guide to the H.264, H.265, AV1, and VP9 trade-offs is here for anyone weighing codec choices: https://antmedia.io/video-codecs-streaming-guide/