I know title says truth but how else you gonna get clicks?
This is my humble opinion
Americas has more individual talent scatter across teams while EMEA has less individual talent that is focused on a few "superteams"
So imo:
AMERICAS LEAGUE > EMEA LEAGUE
but,
The EMEA superteams > AMERICAS superteams
Doesnt matter if ur a "3 team region" if those 3 teams can win against AMERICAS.
In conclusion, I enjoy watching the Americas league because more competition, but EMEA top teams are (probably) better than americas top teams.
Edit
TLDR: Americas has better internal competition while EMEA has more title contenders.