Joe, that's gonna be a hard one. I suspect most folks have used either one or the other, so they don't have a basic to compare the two.
I have a Standard Trans. unit, it seems to be fine, but I only have 7k or so on it, not enough miles or time to say how it'll do over the long haul.
My advise is compare the two price wise, then the warrenty and shipping from your location and go from there.
Good luck, RJR