Productivity: Derivational affixes may have more limited productivity compared to inflectional affixes, and their application can vary across different words and contexts.
Function: Inflectional affixes primarily serve grammatical functions, expressing grammatical relationships or indicating aspects such as tense, number, case, or comparison.
Finally, inflection never changes the meaning of the base lexeme, while a word formed via derivation can be semantically different from the base lexeme.
Inflectional affixes are highly productive and appear after derivational affixes, whereas derivational affixes may have more limited productivity and appear before inflectional affixes.