yes you can measure the hardness of techno
by repeatedley smashing people over the head with your records.
everyone knows that house music doesn't hurt
techno is annoying
and hard techno is time to call the police
so....
if someone whacks you round the head with some records and you think it is time to call the police
then it must be hard techno
and then you should judge it's hardness on how quickly the police arrive at the scene of the crime.

easy

next question please !