Those aluminums are going to be splined different than the carbons. That alone can cause the difference in where they are striking. Especially when it' s a vertical displacement when shooting a release.

Take the carbon arrow. If it' s on target with the field tips, but low with the BH' s then a simple lowering of your nock point a smidge may cure the problem.

A good link, and a good place to start.
http://www.eastonarchery.com/news/tuningGuide/complete_tuning_guide.pdf