Looking at trading my 9610 for a 96 or 9770. Was looking for a 9770 but have found a cream puff 9670 I can trade for right. Will I notice a difference in these two machines in wheat from 30-50 bushel per acre? Will have a Mac-Don 36' draper on whichever machine I end up with. My partner traded for a 9770 and I need to be able to run side by side with him to keep everything equal. Wheat will be the only crop harvested.