A CX will never have power steering, but some DX's don't either (I've seen 2 that didn't and they were both 5-spds).

The biggest tell-tale sign if the engine codes are un-readable is to count the number of wires coming off the o2 sensor. DX uses a 4-wire heated-element sensor, CX and VX use a 1-wire sensor. A CX will not have power options in the interior aside from the brakes.

ANY model hatchback can have a passenger side mirror. It was a dealer option on all of them, but they came without them from the factory (unless it was an Si) so the original buyer had to ask for it and pay extra. The mirror's not a good way to determine the model.