Delphi Vs. A C Delco

I am wanting to do a tune up on my '06 CTS and want to replace the coils. I can get Delphi coils at Rockauto for $38 or A C Delco for $66. I seem to remember Delphi was founded by GM but has since become a stand alone company. Are Delphi parts just as good as A C Delco? As much as a chore it is to get to 4 of the coils, I don't want to have to replace any in a few months or a year. Also, I know on some Ford models, a coil failure can take the control module out. I would appreciate any input. Thans.