Larry ,
For me are patterned ones those with the ripples in the eye like for example Waves of Joy , Greek Art ,Venetian Pools ........ but i include also the multicolored ones like Butterfly Cove , Say Can You See ..... even Blues Music , they have for me a pattern of colored rings of color and in combination with wave patterns they brake up easy it seems .
Blues Music btw gives also patterned seedlings easy and is verry podfertille
Rose Colored Rainbow also a nice patterned one