They probably both sell the exact same carpet from Auto Custom Carpet. They each sell both standard and OEM style massback carpet. The massback is heavier and provides a thicker backing to reduce cabin noise.
I purchased the standard carpet from AM, and the fit in the front was very good. However, the fit in the rear, over the transmission tunnel, wasn't so great. Luckily, you can't easily see the rear floorboards in these cars so it isn't horrible, just something to be aware of.