Pretty much, although it's all very subjective. Some manufacturers quote very high output watts but the amps don't deliver. You'll find a 200 watt valve amp can butcher many a 500 watt class d or solid state amp for sheer power. If you're hooking up to a single 8 ohm cab you'll most likely only be getting a bit over 50% of your amps power anyway since they mostly deliver full power at 4 ohms (2 cabs).