Whether TKey or Precursor is better depends on your needs. Here are some differences between them: * TKey uses open tooling for everything. Precursor uses Viva

Whether TKey or Precursor is better depends on your needs. Here are some differences between them: * TKey uses open tooling for everything. Precursor uses Vivado. * Precursor has a screen and a keyboard, allowing the user to interact directly with the trusted device in a completely different way than the TKey. * The Precursor is bigger than the TKey. * The Precursor costs much more than the TKey. Finally I'd just like to mentiont that bunnie and xobs work on Precursor as well as their other projects have been a great inspiration to the TKey project.