The Chicken Soup for the Cat Lover's Soul Light is a favorite around here. It's got great ingredients and tends to be a hit with the hedgies. Rocko eats it like it's a treat.
I don't know much about the Purina. High protein and low fat is always good. And the primary product is a meat, which is also good. But the second ingredient is corn-gluten meal, which isn't the best, and it also contains meat by-products which also isn't great. It's better to find a food that has a meat as the first ingredient and a meat meal as the second, or two meats as the first two products. You can check out the Dry Food List (stickied at the top of the Diet/Nutrition forum) for the best foods. The Chicken Soup is on there, though, so good choice with that one!