The Thinktank Photo I feel is better than the Calumet if you want serious shading.
It is a bit deeper and works with several sizes of laptops. The screenshade that CI sells is great as well, but it is fixed to the size you buy.
I own a lot of Thinktank products and there is no better company out there. Their only competitor is LowePro in quality and design.
Best of luck!