A similar thread appears every year. There is no answer.
Imagine a program with 20 PGY-1 spots in the match, they interview 10 per spot, so 200 applicants to rank. In that case, I'm really not going to sweat whether you're ranked #111, 112, or 113. I'd drive myself crazy worrying about things like that. In this case, I'm likely to categorize whether academically which quartile of the list you will fall in, and then use your interview performance to decide whether you'll be at the top or bottom of that quartile.
On the other hand, if I'm matching 3 PGY-1's and interview 25 people for a competitive field, the process is likely to be very different. In this case, all 25 are likely to be academically strong, and the differences are likely to be small. With a small program, "fit" becomes more important, and interviews might have a much bigger impact -- i.e. aacdemics buys you an interview, interview performance drives your rank.
A poor interview performance can get you dropped off the rank list, in any system.