B8's are great. I run them on my MK7. But they need to be paired with more aggressive springs as the B8's are a shorter & stiffer strut. So softer springs will often bottom them out.
Like H&R Sports. Those are a popular combo with the B8 strut.
Yes, you'll notice a difference. As the car will have proper damping. Ride won't be as harsh, bumps won't be bouncy, cornering will be more definitive & sharp.