Is this a linear comparison though? There is some established domestic leagues in all the Celtic countries, this enables the teams represented in the pro14 (and international coaches) a better rounded way of identifying talent.
As I said, the Pro14 has been a blessing for Italian rugby as a whole, there are some players who are developing into some incredibly exciting talent.
This discussion was specific to Italy and Italian players though, you need to understand that they do not have sports in school and it is incredibly difficult to identify prospects in the same way, because of this the talent is pooled into Zebre and Treviso not allowing other players with potential to develop in a high pressured league.
I stand behind my previous opinion that the more players who manage to develop their game in unbinary/ un-nationalised top European teams regardless of league, the better for the progression Italian rugby.
My apologies if I made some spelling mistakes, English isn't my first language.