Yep, there are always differences. Just one thing I stumbled into recently was one of our program images that has long worked fine in AWS can't start in Azure b

Yep, there are always differences. Just one thing I stumbled into recently was one of our program images that has long worked fine in AWS can't start in Azure because something their hypervisor does to the virtual address layout conflicts with the way that we remap .text to a huge page. It is both trivia and a showstopper.