Graded population reports do not provide information on set print size. They are more relevant for exclusive promos with known counts, and even then, they can be wildly inaccurate due to extra copies floating around and regrades.
The folks with true print size data would be those working on the production line fulfilling print orders or those writing up the orders. @cataclysm80 do you have any information about Neo print runs and 1ED/Unlimited print sizes?
Anecdotally, I have not seen any indication to suggest that Unlimited was printed less than 1st Edition.