It's probably just a matter of preferring the mechanically superior 20Amp IEC connector to the "industry standard" 15A inlet
Just because the appliance is fitted with a 20A inlet does not mean it cannot be plugged into a standard wall outlet - if fitted with a 15A connector on the male end of the power cord.
20Amp Cord Cap
Above a link to a 20A power cord connector
As Always Good Listening
Peter
Just because the appliance is fitted with a 20A inlet does not mean it cannot be plugged into a standard wall outlet - if fitted with a 15A connector on the male end of the power cord.
20Amp Cord Cap
Above a link to a 20A power cord connector
As Always Good Listening
Peter