Chords doesn't play right
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It sounds to me like the original file was a "Programmed arp pattern" being triggered by midi in the first demo.
In the second demo, it sounds like the midi notes you used are playing just the recorded midi notes you used to play the original Arp pattern.
So... you need to find the original Arp you used on demo one, or programme the arp to suit, or... play it like the original demo chord/note sequence and save that midi data so it will always play the same, whatever sound you use.
Hope that helps