These are all fan made images with no authoritative backing whatsoever.
However, if the image of the engine duct posted a few months ago indeed shows a component of the H-XX, then it can be implied that the H-XX will be significantly larger than the B-2. Some of the latest artwork from 草根设计师-CAD implies that as well although I'm not sure how credible or realistic the images are.
It is possible that China sees potential in an entirety stealth bomber force vs the smaller “precision” B-2s. They don’t have super large bombers, so the H-20 might be an attempt to add one.
Given the general strategy of reliance on quality over quantity and PLA status as mainly a self defense force, a smaller completely stealth bomber force of large stealthy planes makes sense over a larger force with small B-2 style stealth bombers and large unstealthy B-52 sized craft. The latter is not very useful in defense, while the former can work extremely well in naval strike