This is the basics with the two of them....
I don't know what kind of activity your car will see, but i know the holley system max kit is a great track kit, but kills low end on street. (hopefully you have steep gears!) I go hear their #8 cylinder has flow problems, but thats pretty common w/ alot of 5.0 intakes. For the street it is nothing to be concerned about. I've never tested a holley car.
Are you looking at Trick flow street, or track? My buddy ran the street setup w/ a strengthened stock bottom end, with a t-5 (that didn't last long!). He got in the mid 12's, and it felt like a real sledge hammer. I drove it, and had no drivablilty problems on the street w/ street rubber and trim. I don't know real track times, but in a broad sense, the trick flow was perfect on the street, and thier stage 1 cam has a great lope sound. The holley makes more power, but if you want to sacrifice lower end for more top end power, it seems like the way to go.