Strange alternate page seen on one computer after clicking "get minecraft"

On my own machine, when I go to minecraft.net and click "Get Minecraft" I see the following steps:

HOW DO YOU WANT TO PLAY? computer, mobile ...

(I choose "computer")

WHAT PLATFORM DO YOU PREFER? java-edition, windows-10

 

On my friend's computer when he does the same thing, it shows him a different 2nd step:

HOW DO YOU WANT TO PLAY? computer, mobile ...

(He chooses "computer")

WHAT PLATFORM DO YOU PREFER? pc, mac, linux

(a screenshot is attached below that shows this strange panel)

 

I tried it on a few computers and browsers. Only the browsers on his machine show this alternate "pc, mac, linux" question. All the others show what my computer shows ("java-edition, windows-10").

 

How can the official minecraft website be delivering such vastly different UX flows to different users? Is my friend seeing a false site or is this standard minecraft.net behavior?

 

I love minecraft, thank you!