Most camber plates are metal on metal, which is a little annoying for me on a DD. With the bolts you can keep your factory uppers which absorb noise better. But for racing, you won't hear any additional noise over your engine revving the whole time.
The correct camber is achievable with both, but do you really need the race "tightness" that you can get out of camber plates. I guess that is really up to you.
I'm no pro, but this has been my experience with both. Either way, it looks like you are building a good car. Good luck!!
2013 Mustang GT Base, with Track Pack, black, 3.73, 6MT, Boss 302 intake, SCT Bama tune, GT500 strut mounts, FRPP K-springs, FRPP adjustable shocks, BMR adjustable pan hard, Eibach camber bolts, BBK cat delete, Flowmaster 3-inch catback, Airaid CAI, Boss 302S wheels 255/40-19 front, 305/35-19 rear. 420 rwhp, 370 lb/ft trq.