Whats The Difference Between Mino Hd And Ultra Hd Which HD Flip Camcorder Should I Buy?

Which HD Flip camcorder should I buy? - whats the difference between mino hd and ultra hd

Recently I was looking for to buy an HD camera to shoot videos with my friends. I saw that the "Flip Ultra HD video camera was looking to buy on sale for 179.99 at Shopko and plans. Then I have and found a new one," Flip Mino HD video camera. What is the difference between the two ? Mino is the latest and goes to 220.00. The reason I ask, because it is only a temporary camera. Finally, I would get the Canon HF20, but at this time is very expensive. So what's the difference between the two cameras, flip and I can expect?