I think this could directly be correlated to the availability is tier 2/3 tournaments and high-talent teams willing to scrim GC teams. Both of these are significantly more common in NA, so it makes sense that with the more frequent better practice, the GC teams there have improved a lot in comparison to the EMEA teams. There are even partnered teams scrimming GC teams in NA. EMEA really need to start investing in their GC scene.