I have yet to find a motion sensor that works well and lasts. Went through 4 in 10 years. Finally, I got fed up and installed a dusk to dawn sensor with 2 CF floods (they're 20-something watts each, good enough for my application.) I had been using 2 150-watt floods, but didn't want to use that much energy 10 hours a day.
Perhaps an electrical supply house might sell motion sensors of higher quality.

I'd find the manufacturers website for the two models and download their spec sheets. Might give you some clues.

Integrated sensor/lights might be the way to go.

I don't know what it is in motion sensors that wears out, but they do. I think the lenses get cloudy, and the sensor inside probably has its electrical values change with age due to the sun etc.

CFs are good but not so good in colder temperatures.