In my experience, XPath selectors are easier to write but usually result in selectors that are less robust to DOM changes. It is possible to write reliable XPat

In my experience, XPath selectors are easier to write but usually result in selectors that are less robust to DOM changes. It is possible to write reliable XPath selectors as well, but I often see XPath selectors breaking because of implicit assumptions about the DOM structure. I don't see this as often for CSS selectors since they encourage you to make more explicit assumptions. This is in the context of test automation of modern web apps with a virtual DOM. I'm sure things might be different in other areas.