Yeah, I noticed that of the actual sunload sensors are the same, but with different snapon housings. I had 3 of them (J30, JDM S14, Altima) and just chose the one that looked like it would fit best.
Also, I ordered a new windshield vent to go with it, and it didn't have the outline/stamping for the sensor! I cut the vent and sensor from an Altima and just traced the pattern on to my new vent.