The RMS wattage is really what determines the power, not the maximum.
On the 2 Bosses, they run 750w RMS each, so 1500w RMS total.
On the Pioneers, they run 250w RMS each, so 500w RMS total.
So as far as power goes, the Bosses are 3 times more powerful as the Pioneers for only about 30 bucks...