When comparing Tails vs Doudou, the Slant community recommends Tails for most people. In the question“What are the best Linux distributions for desktops?” Tails is ranked 16th while Doudou is ranked 53rd.
Ranked in these QuestionsQuestion Ranking
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 Concise "all in one" kid experience
From the pre installed apps to the interface everything about this distribution is dead simple. No necessary set up, just boot and go.
Pro Installable live cd
DouDouLinux comes as a live cd, meaning this distribution can be used on any computer not matter the OS in Live CD mode as well as installed fully onto the device depending on the hardware support.
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 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 You can't install it to a hard drive
Con Slow internet
Tails uses the TOR network and as a result the internet on your computer will be very slow.
Con Based on an old distro
DouDou Linux is based on Debian 5, which is pretty old. So this means the software found in the distribution will be old. This also means the hardware support will be lacking compared to newer based distros. So for those that do want to install it would be a good idea to make sure the hardware is supported by Debian 5 and DouDou Linux.