What is the difference between a B9 and B9.5 Audi A4?

I am looking at buying an Audi A4 and I noticed there are two versions, B9 and B9.5. What are the key differences between these two versions?

The main difference between the B9 and B9.5 Audi A4 is the exterior design. The B9.5 features a refreshed front and rear bumper, as well as new headlights and taillights.

In terms of technology, the B9.5 also has some updates such as a larger infotainment screen and a virtual cockpit display.