Zeiss 80 mm planar

[toyfel]

How different or similar is the optical design (apart from lense coatings) of the Rolleiflex 2.8 Planar compared to the Hasselblad 2.8/80mm Planar? Just wondering, I love the images made with both lenses.

[MikeL]

Here's something I came across regarding photos: Four camera test (http://www.hevanet.com/cperez/test/fourcameras.html). Don't know about the design....