What’s the difference among GM Tech2 diagnostic scanner

Vetronix GM Tech II is the universal diagnostic equipment for GM group (GM, SAAB, OPEL, SUZIKI, and HOLDEN). There are several GM Tech2 diagnostic scan tool available in obdexpress.co.uk. What’s the difference among them? You can easily figure out in the table list below.
GM Tech2 diagnostic scanner-1
GM Tech2 diagnostic scanner-2

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