When comparing Tails vs Parrot GNU/Linux, the Slant community recommends Tails for most people. In the question“What are the best Linux distributions for desktops?” Tails is ranked 33rd while Parrot GNU/Linux is ranked 37th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Privacy focused
Pro Has TOR built-in
Use the Internet anonymously and circumvent censorship; all connections to the Internet are forced to go through the Tor network.
Pro Easy to use with an USB key
Pro Compatible with Debian
It is compatible to Debian >=testing.
Pro Testing based
It is always based on the latest testing release so it includes more recent software than a stable based distribution.
Pro Focuses just one desktop
It focus the MATE desktop which makes it unique compared to the more general distros.
Cons
Con Not for daily use
Tails is a privacy focused Linux distro. The updates that you will receive are only for improving privacy and not for improving user experience.
Con You can't install it to a hard drive
Con Saved states are not present for security
For security reasons, saved states are not supported in Tails. Files can be stored in a separate, persistent volume which must be accessed with a root password. Personal settings (e.g. -- keyboard layout, window settings, etc.) are not saved persistently across reboots. This can be a hindrance for anyone not using English as their language, or not using a QWERTY keyboard layout.
Con Only GNOME desktop environment
Con Slow internet
Tails uses the TOR network and as a result the internet on your computer will be very slow.