Comparing Xcode Target Build Settings
Simply shift+click the targets you want to compare and then enable the “Levels” toggle on the top filter bar.
By doing so, Xcode displays each target’s settings side by side for easy comparison. Furthermore, you can/should also enable the “Customized” toggle make it even easier to spot differences.
Not only does this Xcode feature have none of the drawbacks mentioned before, it also allows you to compare more than 2 targets! Simply shift+click another target and another column is displayed!