Shades of the Mackay Mausoleum

On a recent visit to Calvary Cemetery in Queens, I saw the Halloran mausoleum  (top photo)  for the first time. Surprisingly, in all my years as a funeral director, I’ve never seen it before. Probably, because I almost never enter the cemetery on Greenpoint Avenue. In any case, I was immediately struck by the similarity to the Mackay family mausoleum, my favorite in Green-Wood. I'm attempting to find out additional information about this structure. In particular, I'm interested in knowing which mausoleum was built first and did they share an architect. If anyone knows, please post here.