I meant that the best available lens for the Rolleicord was the Xenar.
My Rolleicord has a Xenar lens and my Rolleiflex has a Tessar. I think the Xenar has the edge but there isn't really much in it. And as I usually use them around f8 rather than wide open I doubt that there is any discernible difference.
"People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.