I would say my O. spinosa and my O. spinosa var minutum are a good match to the O. spinosa and O. spinosa - minuta on that site.
A few months ago I thought O. spinosa var minutum looked exactly like O. spinosa only small and I wondered if it was just a pathetic O. spinosa. Now, my O. spinosa has developed that characteristic center, but O. spinosa var minutum has not. It looks more like O. spinosa offsets. It sounds like somewhere along the line somebody mixed up minuta for minutum or vise versa. I'm keeping mine the way the original tag says it is for now.