Apple watch GPS on cellular models

I am aware that it doesn't require cellular. I would imagine that my watch, which is a cellular model, would have both satellite-GPS AND cell-GPS available. My question is which one does it actually use when walking outside?

Sorry, I did not find your answer very clear. Did you mean that the watch will use satellite-GPS even if is is a "cellular" model? (That is what I was hoping!)

Thanks’