Your question is Comparing Regions with Seasonality. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You are comparing performance across two regions, but each region has a different seasonal pattern and the raw numbers move with the calendar. You need a fair way to judge whether one region is truly performing better.
How would you compare the performance of two regions with different seasonality patterns?