Both please, I tend to keep my cars about 5 years, so I want something that will last as long as my time with the truck.
Build quality of AWE and Borla/Ford Performance are going to be on par with one another. I'll give a slight nod to AWE Tuning considering that they are a more premium brand, but Borla has come a long way in the last few years.
Regarding sound quality, the Ford Performance systems (still built by Borla) are going to be more mild than their Borla branded counterparts. The Borla systems, both S-Type and ATAK, are known for having a bit of a raspy sound and can drone at highway speeds. However, this can be eliminated by using the Borla Resonator.
AWE systems have a unique sound to them so it's really personal preference. However, it's worth noting that due to the materials used on AWE, their exhausts do have a break-in period of 1000 miles. Once they get that break-in carbon coating, the sound changes and mellows significantly.