Marco, the G70 analyze all the tracks of a SMF..so the harmonizer is easier and more efficient to use..

Most likely on the Korg , you will have to select a single track with in the SMF..unfortunately this best track can change from one SMF to another..The Yamaha , and Ketron work along the same principle as Korg..

I think you are going to find the G70 was a better harmonizer design..