Why use TOR instead of Mullvad browser + Mullvad VPN?

The best way to find out about Tor (Browser) is to try. Android APKs are available, likewise for Linux, Windows and Mac. iOS is a different story.

torproject.org

The Tor Project | Privacy & Freedom Online

Defend yourself against tracking and surveillance. Circumvent censorship.

FYI, the downloads are for the browser, not for standalone Tor or Orbot.

But yes Tor has drawbacks. It is not as fast and is more likely to get blocked than a VPN or direct connection. Compare Tor Browser and Mullvad Browser + VPN with the same browser settings.