The 1920 reference says “The colour of the rose is cherry-red, approximately like Ulrich Brunner fils.” (We list the colour of ‘Ulrich Brunner fils’ as deep pink to cerise.)
It appears that the synonym of ‘Red Druschki’ has been taken too much to heart and perhaps the colour of ‘Ruhm von Steinfurth’ should be shown as cerise to cherry red? (At the moment we have the colour listed as red, and cherry red.)