Reach

Reach expands your attack range beyond the vanilla 3 blocks. Other combat modules read its range too, so it acts as the single place to control how far you fight from.

Range

Sets your attack range from 3.5 blocks (the default) up to 8. The higher you go, the earlier and more consistently you hit; but also the more obvious it becomes.

Caution

Extended reach is one of the most checked cheats on any server. Anything clearly beyond vanilla range is trivial to verify server-side. Keep increases small and test on the server you actually play on.