Ok, I'm sure this has been asked 1,000 times but I'm not finding a good thread on search so here goes (assume this will be a quick answer):

Preparing to book a trip - I'm Plat, travel companion is Gold. If we book on the same PNR, would be both be eligible for upgrading in the Gold window or do we both slide all the way to the bottom of the list? Suppose could also book separately but was thinking if I booked both seats at least we could get Comfort+ at time of booking free of charge.

Thanks!