On the other hand, you can get a dozen Watts of 445 for the price you pay for 300mW of 473. So the luminosity per unit COST (not power) is a whole different ballgame.
445 is like an American muscle car, a lot of power and quantity, but hardly any elegance.
473nm DPSS and 488nm argon blues are more like a nicely crafted English sports car -- the right amount of power, with proper handling and finesse.