I prefer the Ace Metal brief over the predators. The legs are a little to long for my liking. The Ace are thick, and provide a lot or protection to your hips.
Also base your decision on your squat stance, medium, wide, or narrow. The Ace are for wide squats, I use mine for sumo deads aswell. I tried them for conventional pulling and it wasn't happening due to the cut of the brief.
LC