Do NPN and PNP phototransistor switch complementarily?
The physics are the same for NPN or PNP.

Incident light creates hole-electron pairs in the Base-Emitter PN junction. These are driven by the external field to provide a base current that biases the transistor. This base current will be amplified by the beta of the transistor to generate a collector-emitter current.

The only difference is in the direction of the current, i.e., how to externally bias the transistors.