Being the same source and the same data are more valid in comparing. Organized by latitude (but with longitude too). Officially the data belongs to WMO, but hosted by NOAA acting jointly, with registration corresponding to 1981-2010.
Unfortunately there is no way to do the same for the normal ones from 1981-2010.
It can be seen here:
https://en.wikipedia.org/wiki/User:K...dbox/climatePL