@Bass
Here is an original mail between baud and me some years before (his answers in yellow):
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Is there a significant difference in quality/quantity between Dorree, Madeleine, and Brunswick? MADELEINE DES DEUX SAISONS and BRUNSWICK are similar with a tree bigger than the tree of DORREE
Is there a difference between Brunswick and Castle Kennedy? For me, BRUNSWICK is the same variety as CASTLE KENNEDY.-------------------------------
@Gorgi
The shape of the fruit you show in your link is very uncommon for MddS.
The fruit shown by snaglplus is more typical.
However, these varieties are very winter hardy and productive, but, rain, humidity, and cold weather is a problem. The do split (Brunswick), fall from the tree (MddS), or soure (Dorree).
Dorree is perfect for a climate with cold winters and hot and dry summers.
Very productive, small tree, very sweet and excellent taste.