I don't have any experience with Demon Drive or Trick pedals so I can't offer an opinion. I grew up with the Gretsch floating action pedals so it was natural to replace them with dw9000s when I bought new pedals. There are many factors that go into how a pedal performs and the dw9000s have an amazing amount of adjustability. It took me a while to get them dialed in (spring tension, infinitely adjustable cam, beater choice, shaft angle and weight, etc.) but I am very happy with their overall performance action. I have read that some guys who have the dw9000 double pedal get rid of the stock drive shaft and replace it with the more superior trick drive shaft.
All that said I don't think that the slave from any brand of double pedal will behave exactly like a main pedal. The video below demonstrates why that is the case and how to set up the drive shaft of any double pedal for the best performance. I sent this video to Terry Bozzio and he said it helped him get a better action on all the pedals he uses that have long linkages.