When comparing NameChanger vs Notational Velocity, the Slant community recommends Notational Velocity for most people. In the question“What are the best power user tools for macOS?” Notational Velocity is ranked 11th while NameChanger is ranked 76th. The most important reason people chose Notational Velocity is:
The interface is clean and unobtrusive.
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Pros
Pro Free
Available free of charge.
Pro Allows easily batch renaming files
For anyone who's ever needed to re-sequence or rename a list of items in a folder, it can take a long time to hit "Enter", type your new file name, "Enter","Arrow Down", "Enter", Type, "Enter", "Arrow Down", "Enter", Type, smash you head against the keyboard.
Name changer allows you to batch rename those files in one step. Options include replacing the first, last or every occurrence of user defined text, removing text, append or prepend text, searching with wildcards, sequencing and even has support for inserting dates. It shows you a preview of the new file names before committing any changes.
Pro Simple and minimalistic
The interface is clean and unobtrusive.
Pro Free
Pro Syncs with SimpleNotes or Dropbox
Cons
Con Feels a bit outdated
The last release was from 2011. Although due to its brilliant simplicity in doing what it's designed for, some might think there hasn't been any need for an update, as long as it still works with the newer OSs.