Shall we define wattage at this point? Yes, we shall.
Wattage DOES NOT equal loudness.
Wattage is a system's overhead before it naturally distorts. Think of wattage as a celling. Once you hit the celling, you hear clipping and distortion.
A 400w system can go louder while still being crystal-clear than a 225w system. Generally speaking, can a 400w system be louder than a 225w system? Yes, because it's generally a side effect of higher wattage... but can a 225w system be as loud as 400w system? Yes, just when cranked up to 10, won't sound as good.
Working in a guitar store with amplifiers, I explain this to customers every day. We have 30w amplifiers that are JUST as loud as 65w amplifers, and 40w tube amps that are louder than 100w sold-state amps.