Power(watts) and money are not tied together. You can find 10 watt stereo amps for 10 times the price of a 350 watt amp. It is the combo's synergy that gets liked or disliked.Just look at the specs of yamaha rs202, an entry level yamaha amp costing 20k, mentioned as high power output of 100w per channel. Do you really think a marantz costing Twice that of the yamaha will output half the power?
These are just how the company markets its products