AV1 is argued to be better on the web.

AVIF decodes a low-fidelity rendition befor the full image arrives for example. AVIF is considered slow to decode a 5456x3632 photographic image. 700ms for libjxl

At the time, JPEG XL was a much stronger contender for medium-high fidelity lossy image compression. AVIF now dominates the entire fidelity range, so JPEG XL's one real advantage has disappeared.

So AV1 and AVIF are better for the web, but "My current optimistic hope is that JXL takes off outside the web among professionals working with tools like the Adobe suite or alternatives, and camera manufacturers, smartphone OEMs, and others take notice and begin to think about JXL more seriously."