Extra BSP inside the BSP

I was opening up the BSP container to take a look at what it would take to change the device tree for potentially targeting Ubuntu. When I started to inspect osdzu3-ref-bsp-2023.1-2.1.zip I found inside the bsp file another bsp file osdzu3-ref-2023.1-V2.bsp. I then opened that one up and found that it is slightly different. Perhaps the deference between rev 1 and rev2?

My question is just if you are aware that it is inside.

Please ignore. prebuilt folder contains artifacts from previous builds.

Best,
Neeraj