Since there is no set-in-stone procedure we can contradict each other and we all go by our gut feeling here. And if it makes you feel any better, I'm both former DO and DL so I've been involved with quite a few applications.
The current procedure does usually include a link to your EIB application. But it does not require it to be the same armour. It's just assumed that it is, because it's such a rare occurrence that someone applies for EIB, waits around for a few years, and then builds a new armour to use. The norm is to apply for both EIB and Centurion in rather short succession.