answer 1
The Flip Mino is about 40% smaller than the Flip Ultra. Mino comes with a built-in rechargeable lithium-ion battery, while Ultra runs on AA batteries. Mino also has a sleeker design and features touch-sensitive buttons.
However, both produce the same VGA-quality video, and they both feature the same simple user interface. Both also come with the built-in FlipShare software, which lets you save and organize your videos, email them, or upload them to YouTube.
answer 2
ultra uses AA batteries, Mino uses internal rechargeable
Mino also much slimmer and smaller
Otherwise the same.