I like the CASE Cummins/Case diesel engine a little better. I think it might be a bit more HP, but that might have changed with the newer models. Although it's tough to find much fault with a Perkins.
I liked the fact that my CASE was made in USA, the CAT is made generally in England.
I like the locking diff button on the CASE loader joystick better than a foot actuated pedal on the CAT.
I like CASE's lower overall cab height & lower overall backhoe boom height. The machine overall is a bit smaller. It looks to be about 7/8's the size of a comparable CAT, which is better for my needs.
I think CASE might give you one or two more gauges in the gauge cluster to monitor your machine.
Those were the reasons I focused on Case over CAT, because they suited my situation & needs better.
However, CAT has advantages over CASE, like bigger front tires, just to name one of many, I'm sure. I can think of lots of reasons to buy CAT over CASE if I were in a different situation.
I think a lot of the decision comes down to what brand's dealer is in your area and how well they'll service your needs.