You're comparing a $480 kit to a $3,750 kit. The line array has greater bass impact, especially at high volume levels. The 7" Vifa midwoofers are a bit warmer and have a slightly cleaner midrange than the 12" Eminence woofer. If the Eminence tweeter is an 8, the Fountek ribbons are a 10+. You can hear the difference in any music with soft strikes on a ride cymbal; there's quite a bit more resolution. The image localization is better on the 3 Pi; the soundstage is bigger on the line array.