I do not think an average driver and car would notice any difference. The slightly higher UC BJ Point only adds a small amount of extra camber under upward suspension movement. Stock mustang suspension is often a little warn, tyres have larger profiles and alignment rather conservative so they tend to wonder around and be less precise anyway. So without the change being co-ordinated with a set of other upgrades then that change on its own, I would expect, would not be noticeable.