Well it would give you the opportunity to compare the responses to your answers like for like.
 
It would also protect you from a charge of being guilty of "contempt prior to investigation" which is your current position from an epistemiological perspective.

I don't know whether this stuff works or not so to hear a first hand report of a direct comparison between these two systems would have been helpful.

But I do understand the difficulty from your own personal stance.  Should this equipment actually vindicate your polygraph experience where would you go from there?  ;)