i have both the HX3.5 and 3.6 . they are very close sound wise , i think the 3.6 is a little richer or refined , it also has a better reverb and much better pedal base . there's
also way more tweakablity , if that's what you're into . the newer board , i believe , has more memory capacity and can store some additional organ models , which have
recently become available . one of the things that stands out with the HX3 sound engine is its' FPGA chip , its got a very analog " feel " to it . the way the notes come off
your fingers . nothing digital about it . i don't own a MAG , but i've played one , a P2 . hands down the most well made clone out there . was blown away by the build quality