Both speakers “sound power” are down ~15 dB at 20K ("listening window" on the Revel actually deviate down more then the Magico), they just, conveniently, gave the Revel graphs more smoothing, so it is harder to see (Note the Magico scale is a bit larger). I also like how they pick on some Magico “bumps, but say nothing on their own (look at the 228 tweeter at 5K). The biggest difference will be the upper midrange, the Revel is more forward, and will sound more “present”. That can also explain a preference in A/B testing but may prove fatiguing for long terms listening (i.e., the "BBC dip"). Most experience audiophiles will agree that flat FR tend to sound too bright. These speakers were design by engineers, that may be doing too much A/B testing and not enough listening ;)
There are other things to consider, JA just published his own measurements, where you can see some serious issues with the enclosure around 250Hz (you can also see it in the impedance curve). I suspect the A3, being made out of aluminum will have none of these issues. Nevertheless, two well engineered products.
