There is a slightly different cultivar of Napa type cabbage available.
This is known as 青麻叶大白菜 / 青麻葉大白 (M: qīng má yè dà cài; C: ceng1 maa4 jip6 daai6 baak6 coi3). This translates as Green Sesame Leaf Large Cabbage. My local supermarket drops part of the name, just going for 青麻白菜. It seems to me that the difference is purely visual. I can detect no difference in taste. That said, the supermarkets and markets all carry both.
I have been unable to find any English name for this version.