If you release a product a year after another product it will have a new feature or two - nothing to do with more technologically advanced which would be a rather wild exaggeration, just a different balance of features to target a different market, and thus not particularly odd or out of the ordinary at all. If you load a file from the new into the previous there will be the occasion where you get anomalies because of different samples or different controllers. So all you will achieve is get some peculiarly unrealistic sounds and sub-standard styles with bits missing that the designer did not intend, and could not envisage due to the inability to see into the future, which is exactly the case on some 2600 styles loaded straight into the 7000 just as in previous generations of keyboard the situation has been precisely the same. In the case of the styles on www.technicskn7000.com for the 7000 these anomalies have been taken care of by some clever editing beyond the capabilities of most owners, so it's all really quite unremarkable if you appreciate the facts and the history