Theres not really that much difference between them to be honest.
I've used both. Ended up selling my PMI and siding with the dye throttle, purely a matter of preference though I feel. Havent had any problems with either.
Got to be the throttle, never had a problem with it, unlike some regs i could name, but at the end of the day it's your money and your preference, i would recommend try before you buy.