"Surprising" vs. "unanticipated": words that catch us off guard

What is similar?

Both words describe something that was not expected or foreseen; they convey the idea of something happening outside of what was considered likely.

What is different?

Surprising often emphasizes the emotional reaction (such as shock or astonishment), while unanticipated focuses more on the absence of prior expectation or planning, often in a more neutral or formal tone.

Which one is more common?