Yes & no actually, depending on the year of manufacture if memory serves.
I used Medallion cranks in my "big prop" TD's some years back. I'd have to drag one down off the wall & strip it down to report the exact difference but I think it was in the prop driver to crankcase nose clearance area.
Some cranks drop right in to a TD, others require a matching Medallion crankcase. It may have been some of the old stuff I was working with at the time though. My being a lifetime Cox engine piddler gives me some fairly ancient parts to play around with.