rodenstock apo sironar digital vs apo grandagon

[archivue]

i know that apo grandagon lenses use to have a green ring, ant that the apo sironar digital have a pink one...
looking at the both versions of the 55, i've found out that they look similar...
Sometimes rodenstock rebadge their offerings for marketing purpose.
So anybody knows for shure if the 35/45/55 digital are similar or not to the apo grandagon line ?

to ad to the confusion, have a look at this lens...
55 sinaron digital with green ring ;-)

[klane]

That is a sinar branded rodenstock digital, the seller of that lens is George Brown. I have done business with him before, he knows his stuff and is very trust worthy.