OH WAIT. I KNOW WHAT'S HAPPENING HERE.

You're looking at it in a browser that doesn't support JPEG XL, so it's falling back to a WASM renderer, and I think it handles resizing differently.

This is totally my bad. I thought I was doing a good thing by adding that fallback renderer, but it isn't identical and it's giving people the wrong impression.

The lossless version is JPEG XL, hence the difference to AVIF.