I should have qualified "better". I find Numbers easier to use for basic spreadsheet tasks. Advanced, programming-like tasks are better in Excel, which has many more advanced features. I don't think Numbers is Turing complete, but then again I tend to use Python rather than Excel for advanced math processing.

Word has some features that Pages doesn't have, but they're not commonly used, and if you're doing any kind of page layout, Pages is __much__ easier to work with than MS Word.