Probably different sources for the two downloads. I got my degree in computer networking eight years ago, and most of what I learned is now obsolete, but one thing holds true - every packet takes a different path around the globe. And just because two downloads say they’re coming from MS, doesn’t mean they’re coming from the same geographical region. You’d need to know the source IP and then get a reliable geolocator to tell you where that is. I’ve had geolocators tell my my public IP is on the other side of the country before.