That's kind of an apples to oranges comparison. I prefer the Rives disc for calibrating the sound, but that's all the Rives is for. The Avia has extensive video & surround calibration tools, too. It's nice to have both, but for setting up subs I like the Rives (and it's a plus that it's got tones made to comp for the nonlinearity of the Rat Shack meter).