When you use Photoshop on your Windows Bootcamp are you doing it through a virtualization program like VMWare or Parallels or are you actually booting directly into it from start up in a 'Refind' menu for instance.I'm convinced that Photoshop and Illustrator run somewhat faster in Windows, yes. As the hardware gets faster, the difference becomes extremely negligible. The CS suite projects seem to launch faster too.
Purely speculating, and no real evidence to back this up, but it feels like Windows handles networking better in general. Anything network related, Windows seems to do it faster than MacOS. It doesn't seem like it should be true. It could be the way Windows places priority on various network traffic, perhaps it does a better job here?
If you live in web browsers, they're the most obvious example. Whether it's purely a perceived speed, all the little things adding up, I have no idea. I just know that toggling between each OS on the same MacbookPro + SSD, I always think "wow, this is snappy" (on the Windows side).