Both of these pants are outstanding stretch, toughness, comfort, quick drying, etc. There are some key differences however:

Although both have great stretch, the Corrugate pants are significantly stretchier.
The Attacks are made from a slightly thicker material.
The Corrugate pants have an elastic waist, so when coupled with the stretchier material you will likely be able to wear them with and without layers with no problems.
You can order the Attacks with specific waist sizes... you will want to size up if you want to layer as the waist has no elastic.
The Attacks have ventilation, none on the Corrugates.
I prefer the cargo pocket design of the Corrugates, very easy to get your hand into quickly and it also has a second zipper pocket.

Hope this helps you make an informed decision!