Not sure if they draw less amps , depends what motors you are comparing . Thing about the electros is there is several models , and it hard to say what ones a re what unless u have the model number .
The ones advertised as 1500w , could be 1500w or they could be 1400w called 1500w of they could be what i call 1600w called 1500w
So , im not sure what one the carpetcleaningstore has , perhaps ask him for the number .
The Electros that interested me were the conical topped versions mostly , which i got from the states . Buts its easier for me to get 6.6s from the cleaningstore guy , so il switch to them for now .
But for your steampros the electros should fit no problem and two 1500w on one cord should not give any major issues .