Hello, what's the difference between? I don't know which one to buy
New Holland Tractor TN60DA, TN60SA, TN70DA, TN70SA, TN75DA, TN75SA,TN85DA, TN95DA Repair Manual_87393595
New Holland Tractor TN60DA TN70DA TN75DA TN60SA TN70SA TN75SAService Manual_6035443100