Oh boy ... here we go again , this topic has been talked to death and talked to death again but to answer your question.
The Double Bull Blinds are simply the best on the market wheather you get the Matirx or the T5 , the quality of their product is outstanding and will last a life time.
The only other product that comes close to comparison would be the new ASAT Blind , they both have shoot thru screens that can be replaced due to use and time.
Check out their web sites and see for yourself or you could contact gregholland for the Double Bull and buckeyebuckhuntr for the ASAT , they are members on this site and they are dealers as well.
HardcoreHunter has both brands and he did a side by side comparison and writen a great review on both , Germ has both of them too , so he might shed a little light on the subject as well.