Puzzled which is Best? Purina Pro Plan DM or Nulo Grain Free Canned Food

I have always been big on what I am feeding our Candi and slowly left the Cat Food with a bunch of By Products and went to Nulo Grain Free. Then today my Vet wanted me to give Purina Pro Plan DM a try for her diabetes. I got a can, she liked it, not that she is a picky eater anything canned she loves. We do feed her Sardines 1/2 can a day no salt in water but was feeding her Nulo Grain Free Canned Food as well.
After seeing about Carbs I don't know how to tell which is the best and I especially don't like all the junk that is in the Purina Pro Plan Rx DM Food.
Here is what is in Nulo's Canned Food.

 

Never mind I found out the carb index and see her Nulo Food is better for her. Low in Carbs and has real meat listed first.

 

Lol, I was halfway through my answer when you posted that you'd figured it out! Yes, the Nulo is better.