My understanding of these two is that one is sold in a store, while the other is exclusively sold online. I don't recall which is which. However, the one that is sold in stores, have a (reasonably) clear warranty process if something happens. The online version will usually be much cheaper with a non-clear warranty process if something goes wrong. The online version can also not be for your language or region requiring you to pay Autel a small fee to electronically unlock the geo-restriction or allow you to change the language for your region. If you are buying it online, and the price is significantly lower than average. Both devices are really just OBD2 code readers, so my advice is to buy a device in the higher tier if you want to operate a garage or work on multiple cars. Neither device does ADAS, TPMS, programming, coding, immobilizer work