KESS V2 is a ECU programming tool that is perfect for OBD use, while KTag is perfect for Jtag, BDM and all the Boot application (tricore and ST10).
With KESS V2 you programming directly through the OBD port of the vehicle, while with Ktag (Ktag 2.13) you need to take apart the ECU and open it, after you can make the read/write operation.
Many ECU has the advantage that can be read and write from OBD port (so KESS V2 is perfect), but there are lot ECU that need to disassemble from the car and open and this is the case for all the ECU that need to be programmed with Jtag, BDM and Boot protocols, so KTAG is needed.
When to buy Fgtech v54, Kess v2 and Ktag all together? Because non of China tool will cover all cars good and if you buy clone tools, buy all (galletto+kess+ktag) from them, that you will cover more cars, or better to buy a good original tool if you will do the work as a pro, all depends want you will do.
Fgtech 2 comes with all Cars, Trucks, Traktors and bikes. New Boot Mode System Tricore Infineon Tricore Sak TC1766, Sak TC1767 *new Infineon Tricore sak TC1792,TC1796,TC1797,TC1767. READ / WRITE New BMW by OBD2 port.