Data transfer speed between AWS regions
Solution 1:
Throughput depends on the instance size and can be Moderated, Low, High or even static 10/25 Gigabit.
I would start small benchmarking network throughput between EC2 instances: https://aws.amazon.com/ru/premiumsupport/knowledge-center/network-throughput-benchmark-windows-ec2/
This info might be of help here as well (Enhanced Networking): https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/enhanced-networking.html