Although there are many comments on my gallery, it would make more sense to delete mine, via "Expunge Petition", because one of the reasons "A newer higher-quality and clearly marked copy of this gallery has been uploaded" has been met.
No. The previous expunge seems to have arrived that the two galleries are different revisions of the work. Thus they are permitted to coexist. For practical or archival purposes, this is indeed the superior version with respect to keeping a single instance of the highest quality copies.