Tails uses a standard Tor client (currently Tor 0.3.2.10 in Tails 3.6).

Tails uses Tor Browser with some enhancements. I believe the main one is this:

"Tor Browser in Tails is confined with AppArmor to protect the system and your data from some types of attack against Tor Browser. "

See

https://tails.boum.org/doc/anonymous_internet/Tor_Browser/index.en.html

Someone please correct me if I got anything wrong!

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