Okay, so we're in IMC, our EFIS's don't match, and our glasses just fell off our face... Now what!!
Sorry I couldn't resist!
I just know I'd have a hard time with it. For me it wouldn't be too bad if the thing were directly in front of me, but we all know that backups end up tucked away in the least desirable spot anyway. There's nothing wrong with that, it's just that the good (and expensive) gear gets the best and most convenient spots on the panel every time.
I know I'm kinda out there with this scenario - it's just my opinion while I play Walter Mitty for a bit.
Phil