Ive had experience with both quadzilla adr w/ pulse and the smarty, I use the smarty as a demo chip and by FAR I sell way more smartys than anything quadzilla. Its unbelievable how much power you will gain with the smarty but and again you will notice quite a big difference in power with the quadzilla adr to and they also have gauges so it all depends on what your looking for. If you want something easy and dosent require alot of wiring then the smarty all the way but if you want the guages and power in one choose the quadzilla adr w/ pulse.

Nathan McGuire

 

It also depends on how much power your wanting to add.

 

My goal is 400 to 450 before i get outta high school