The x110 has built in amp , so the output with the factory speakers is louder. There is more adjustments ( ie. treble, bass and a bunch of other settings) The navigation works good . I was on the fence for this stereo for a long time . My stock stereo had glitch problems that GM could not fix after 5 trips to the dealer, so i replaced it with this. There is a few drawbacks to the non factory system, like the display on the dash now has no audio info. and you only get one usb output. But that is about the biggest drawback.. The steering wheels control are the same, backup camera works the same. There is a ton of settings and some apps that will take me some time learn. Installed myself in about 4 hours ,very easy install. A few small drawbacks over factory, but the sound difference will make you smile . If ya got more specific questions ask away..