“Not all leagues are the same. We know this from looking at different shot profiles between leagues, different levels of parity between leagues, and of course just from watching different leagues ourselves. This creates a problem when we want to compare different players who play in different leagues. Is a goal in La Liga worth the same as a goal in the Premier League? It’s hard to know and we usually base our opinions on these issues by anecdotally comparing the performances of players who have played in multiple leagues. There are better ways however to do these comparisons using data.” StatsBomb