Anybody tried to compile a list of what Mapnik and Osmarender do render and how differently they do it?

One annoying difference that springs to mind is that Mapnik cannot render icons for amenities that are building/areas, but in Osmarender, the dot necessary for the Mapnik render causes a second icon to pop-up (I tend to delete the dot, assuming that Mapnik is supposed to eventually display it, and it's ultimately redundant either way). Another thing is that https://wiki.openstreetmap.org/wiki/Tag:amenity=hospital on an area display the area, but no icon in Mapnik (which, AFAICT, does not display icons for most areas period), but nothing in Osmarender (which bring the point of whether to apply the name on area, building, or node for hospital...). Also, Osmarender displays name for hospitals, but not Mapnik etc. See the coordinate for an example.