What mirrors do you have now? Are those still the stock ones (hard to believe they lasted 11 years...
). Remove the mirrors and go for a ride. If you can tell a significant difference, then it might be worthwhile investing in new mirrors. Having changed mirrors (on a V-Strom) due to claims on some forums that they are a major cause noise and turbulence, I can tell you they aren't as big a contributor as some people claim. That is, even with the "new and improved" mirrors, there still is noise and turbulence. I solved the turbulence issue with a different screen on that bike.
Anyway, you already know this change happened when you switched helmets, so the real root cause is helmet fit, not some change on the bike. I realize it's a bit late to fix that, as it cannot be returned, but maybe you can fix the liner fit around your ears? Sounds to me like the helmet is "rounder" than your head, which results in a gap in fit around your cheekbones. Maybe a thicker pad could fix that? Most helmets come in 2 or 3 shell sizes and the rest is done with different thickness foam padding. Find cheekpads that are thicker than the ones that came with your size helmet. That could solve it.
Do you wear earplugs?
The Aprilia mirrors (or their cheap clones) are often recommended for their aerodynamic shape, but keep in mind that they have a much smaller useful mirror surface area.
On the Versys I have these Bikemaster GP mirrors, they are a lot better at being mirrors than the Aprilia ones, due to their simpler and more rectangular shape: