IIRC the two Dr.I prottypes were equipped with climbing props and production ones used cruising props.
Undocumented use of different props is one of reasons on why the historical partial performance data we have is so inconsistent and insufficient, both for getting exact performance of one type and comparing their relative performance. On top of fuel quality, battle damage, engine wear, unreliable instruments not adhering to the same standards of measurement between countries...
I have not yet find any evidence that they used "climbing props". There is a post of a member of this forum saying that MvR changed the pitch of his propeller in 1918 (not with the prototypes), but it might be related to the quote below:
All the Dr.Is fitted with Axial propellers had a diameter of 2.62 m and a pitch of 2.30 m. There may have been slight deviations from those Axial numbers on the alternate Lorenzen and Heine props, but not much. The climb propeller nonsense published in Bennett's book is incorrect. ["Taz" Terry Phillips]
Terry Phillips wrote an article on Over The Front Journal Vol.20, No. 2 issue, titled "Fokker Triplane F.1 102/17 & 103/17: A Photographic Study" by Terry Phillips and Aaron Weaver". He seems to understand what he's talking about and he has links to Peter Grosz and other WWI scholars.
So although some pilots altered their machines, like McCudden himself, it is a bit of a stretch to say that there was no standardization or inconsistency regarding the Dr.I. It is more likely otherwise. There were few modifications, most notably the Le Rhône and Clerget adaptations.
Regarding the F.I prototypes, Greg VanWyngarden (another WWI scholar with several WWI publications), wrote in a post where I was asking about the F.I propellers:
The famous photos of Voss standing in front of the nose of F.I 103/17 show it was fitted with a standard German Axial propeller, as was used in many later production Triplanes. Photos of 102/17 show it was similarly equipped; the Axial decal is very prominent.
Then we can assume that data from both the prototypes and the later Dr.1 versions will have common grounds.