Vox AC4 C12 - rated 4 watts output, 45 watts draw.
All my other amps are DIY and I have never attempted to measure their output power or current draw.
I suspect these numbers are not truly equivalent for comparison due to different manufacturers' differing ways of testing their products and calculating these values.
Just as one example, it has always seemed to me that Vox AC15 and AC30 are much louder than one would expect from a 15 or 30 watt amp respectively.
No argument here. There are a lot of factors at play besides simple wattage.
My deal is just that spec inflation leads to abandonment of standards.