Like most of the items that you will see that are upgraded, OBD2 is considered to be an upgrade of OBD1. This means that if you would like to experience a more systematic and more advanced safety protocol, the OBD2 can be the better option for you. One difference between the two is that OBD1 would need to be connected with the use of the cord.
OBD2 does not need to be connected through a cord. All you have to do is to connect it with the use of your Bluetooth or WiFi and it will already work accordingly. Take note that if you have a card that is created in 1996 and below, except that you can only use OBD1 on your car.
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