VCX Nano OEM on the VCX Site or GDS2 Which one is Preferred?

What's the question really?
VCX nano is HARDWARE. GDS2 is SOFTWARE, which requires a hardware to work with vehicles.

You can use VCX adapter with other OEM software which can work with J2534.
You can use GDS2 with almost any J2534 complaint adapter.

Did you mean "MDI2", by any chance?
Anyway, there are no MDI2 clones available, and running any VCX device or MDI clone will get you banned when connecting to GM services.
So if you are planning to use SPS/TLC at any point in the future - better look for another J2534 adapter.

New to this.

Specifically, I see the VCX Nano on the VCX site with "Powerd for OEM" branded on the device.
All other places to purchase I see "Powerd for GDS2" branded on the device.

Is there a difference?

Don't know, ask the seller.. Probably some VCX licensing thing.

@HMI_Regal:

If it is not too old of a topic, did you find out if the NANO worked or was it blocked? Would the Vx_iag FD be a sound choice as the J3524 pass-thru interface? Or will it too cause a blocked acct ?

Just looking at it as a cost effective pass-thru device as global B makes all the modules appear to have "no -comms" .

I have not been on-line with gm....yet. Once a get a J3524 pass-thru and an updated computer ...... I will have to bite the bullet. Thanks

USE OF COUNTERFEIT "CLONE" GM MDI DEVICES will result in your account being blocked.
Aftermarket J2534 devices are not impacted.

Hmmm... I now see they have an "off-line" MDI driver available for some kinds of diagnostics. However they also have the J3524 pass-thru driver as well. Since this is to be used on Global - B network secured gateway ..... the built in security may not allow the hand-shake with modules in the first place. I appreciate the warning.