The difference between "centre" and "center" lies in regional spelling preferences. "Center" is the preferred spelling in American English, while "centre" is the preferred spelling in British English. Both spellings have the same meaning and usage as a noun or verb to signify a central point or place. For example, "exam center" is American English, whereas "exam centre" is British English. Similarly, "data center" versus "data centre" follows the same pattern. The choice depends on which variant of English one is using, with no difference in meaning between the two.
