Replied by Ada on Feb 19, 2014
For Ford FVDI, it adds more special functions, such as Mileage Recalibration,INCODE calculator for FORD, MAZDA, JAGUAR, LAND ROVER, MERCURY, LINCOLN and so on. While Ford vcm ii does not have. If you want basic diagnose or other function, then ford vcm ii is enough, and price is cheaper than FVDI. If you need special function, then choose FVDI.