Hey guys, I am having questions about global entry and pre-check, I obtained a KTN number via pre-check back then and have been using it, enjoying it a lot. Recently I applied for Global Entry (I know I should have applied global entry in the beginning, but I didn't know Global Entry will qualify for pre-check)
I was also approved and provided with another KTN number. (My Amex reimbursed me)

So my question is, since I have both programs, so I have two KTN numbers, which number should I use? are there any differences? anybody on the same boat? I am pretty happy about the pre-check KTN number that I have been using, now the question is if I should start to use the number that global entry gave me, maybe more benefit?

Thanks

W