Arduino mega or UNO

Hi everybody, i am new here and i make this topic because of my new project. I want to make face recognizer and i am worried, if Arduino UNO will be good for me. I saw many project with arduino UNO, but my question is, is Arduino MEGA faster then UNO?

No. Same speed. More pins, more ram, more flash.

No Arduino will be fast enough for face recognition. Consider a Raspberry Pi.