Interestingly unless they’ve moved them again recently the EU FFXIV servers are actually located in Frankfurt, thankfully they moved them a couple of years ago because they were originally in Canada, that move gave most people much better connections though annoyed a number of Americans who’d selected the EU servers and suddenly got really bad latency.
Frankfurt happens to be the same place we host the EU Boundless servers. However even servers in the same city or even server facility can often get different routing meaning we’ve even seen cases where we get consistently slightly different latency to 2 servers hosted in the same location.