What is the difference between Digimaster2 and Digimaster3?

[bisceanu]

Hello, my brother needs a diagnostic tool, he said he want the digimaster, I researched a bit and found there are Digimaster2 and Digimaster3. What is the different of them? Can someone give me some suggestion?
Thanks!!

 

[stevek]

What does he want either of those for, except to roll back miles which is illegal