They are both good lights.
They will last about the same amount of time.
You get a more growing power with the Spider farm.
It takes 3 of the
Mars Hydro sp3000 to put out the power of just two 2 Spider Farm G4500.
Mars Hydro 300 watt
Spider Farm 450 watt
I have found my leds grow lights last longer, preform better, and cost less per grow when I use the higher power lights. I can turn them down to get the lighting I need. So my lights are never being pushed to the max. It like running a small motor on a power generator wide open compared to running a larger motor just over idle. They will use around the same amount of fuel but the larger motor will last years longer. Grow lights are the same way. Get the most light you can afford then turn it down and use just what you need.