These are both nice products. As an example I installed an upgraded FF system to my Met, and the sound was a big improvement over the stock speakers. On my AC/DC I went in a different direction, and installed the pinnovators sub mod, and hooked up an external sub. When I compare them side by side the sound quality seemed better on my AC/DC (at least to my ears). I then installed the same pinnovators sub mod to the met, and compared the two...they sounded equal in my eyes....