Here is the clue.
CarDag doesn’t emulate original VCIs as VXDIAG does. VXDIAG emulates OEM VCIs – also supports J2534 like cardaq.
For example, Cardag cannot work with Ford IDS, only FJDS -FDRS. VXDIAG works with all IDS, Forscan, FJDS, FDRS.
CarDag cannot be replaced for a VCX SE or C6 VCI used in XDOS either. CarDag only works with xentry passthru version. With the Passthru and XPT devices you cannot work a priori on K lines, therefore older vehicles that use them will not be covered. VXDIAG works with both XDOS and Xentry Passthru.
CarDag device can be used as a simple Passthru device, it is not a 1:1 replacement for OEM VCI.
VXDIAG VCI will emulate following software
JLR SDD Pathfinder
Porsche PIWIS II/PIWIS III
Vxdiagshop.com has software loaded to a laptop ready to go. We have a decent T440p with an i7 processor and 8GB ram, you could purchase an SSD and then upgrade the ram when you get it.
VXDIAG VCX SE/Multi VCI also can be used as J2534 passthru for Hyundai/Kia J2534, Techstream official, FDRS, FJDS, Techline Connect SPS2, pcmflash, bitbox, alexflasher, gromcalc and much more.
Cardag Plus 3
Cardag Plus 3, openport 2.o, scanmatik 2 pro, Autel maxiFlash and Bosch MDI they are pretty much the same. Only that the Cardaq supports passthru-2 and DOIP and it’s approved by all OEMs, but if you’re on a budget you can get a good quality GM MDI clone (there’s even a Bosch firmware that you can put on it) and that works fine for most applications.