@25KK Higher quality. ALMOST imperceptible, but you can see it if you look for it. In some instances images here are more than twice the file size of their counterparts in the gallery you pointed out in your (IMO, mistaken) expunge petition.
EDIT: Scratch that. In ONE instance a single file is of a higher quality (image three). I guess the point still stands though - a subtle increase in quality is an increase nonetheless... though it would be a fair point that it's a little pedantic.