If it's a mountain lion it must have had it's tail cut off because that things tail is about 18 inches or less.Like I said put your mouse on the photo and click you can see the black end of the tail. How are you getting an accurate gauge of it's size from that photo? What is in the picture that allows you tell how large it is?
they are not even close in size.
What size do you think the animal in the photo is?