IM508 with xp400 and Gbox does all the IM608 does?

As titled, Autel IM508 with xp400 and Gbox does all the key programming the IM608 does?

No.
IM508 can't do some benz & audi function no matter if you have gbox2 and xp400.
IM508 doesn't have as much MCU functionality
IM508 won't have OE key renewing when it is released
IM508 isn't part of the SGM authorization being finalized

The J2534 is worth something if you are going to expand market
IM608 diag software is good and helps when something isn't working


Price difference for 1 year update was $50.

So the IM608 with XP400 and Gbox is better choice.