I've made facial composites out of large random samples of Northern, Central and Southern Italian soccer players from the RaiSport website, using both birthplace and surname origin as the criteria for inclusion. This is the third (and by far the biggest) regional comparison of this sort that I've done now, and it's the third time that the composites have come out looking almost identical.
Northern Italian (N = 227)
Central Italian (N = 116)
Southern Italian (N = 152)
Here's an animated GIF of the three composites morphing into each other in an endless loop. You have to look closely to see the changes.