Interesting question...
https://en.wikibooks.org/wiki/Bicycl...ing_Dimensions
It looks like that page needs a little updating and expanding.
However, according to the table: Shifter Cable Pull,
Campagnolo 10s pulls 2.8mm
Tiagra 4700 10s pulls 2.8mm
I'm not sure if that is accurate enough, but it is probably close.
And, Microshift does sell Tiagra 4700 10s compatible shifters:
https://www.microshift.com/models/sl-d10b/
Whew, I'm only finding them in Japan, and not exactly cheap.
https://shop.circles-jp.com/en/produ...tube-shifter-1
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Ok, so using the data from the wiki page above, I tried to do a quick consistency test on derailleur cable pull. It would be nice to have an extra significant figure. But, my calcs show that the Tiagra shifter likely pulls about 2.825mm of cable, slightly more than the Campy that pulls about 2.748mm.
Or about .69 mm difference across the cassette. That may be within what the derailleur and chain can compensate for.