This XL variant indicates that the Pixel Watch 3 will come in at least two sizes; however, it won't offer better specs, considering it's not a 'Pro' variant.
Google is reportedly ready to offer a larger display option for the third generation Pixel Watch and now renders of a purported Pixel Watch 3 XL have been published online. According to the image published by Android Headlines, the Pixel Watch 3 XL (preferred over a ‘Pro’ monicker, apparently) will include a larger display and | Trusted Reviews