Hi , i had the x18 air & was used in a live setting only , i upgraded to the cq18t & in my experience so far the cq18t is far superior & easier to use in a live setting .Again in my experience CQ Vocal effects far better & wifi has been more stable than my x18 . Bluetooth built in & bonus & eq easy to navigate . Nothings perfect but so very happy with my cq18t , even though the cq12 has slightly less features i guess the effects & eq layouts will be the same & hopefully you will hear a difference over your xr12 . All the best . C