which tent?

im not sure which one would be better as for as reflectivity..

http://www.amazon.com/Reflective-Mylar-Hydroponics-Toxic-GYO1010/dp/B00283QAJC

http://www.amazon.com/Hydroponics-Grow-Tent-Hydro-Cabinet/dp/B001SS5VPC

cmon guys, which tent is better.. the mylar?