Main differences
The 385GW is a front facing dash cam only.
The 385GWX includes a rear camera as part of the bundle, so you can record front and rear at the same time.
Which model should you choose?
Choose the 385GW if you only need front recording and want a simpler setup.
Choose the 385GWX if you want both front and rear protection, for example to capture incidents behind your vehicle in traffic or when parked.