Segmentation on homepage

Hello Envatocommunity!

currently I’m working on a website for a company that produces products for in warehouses. The company has 4 client groups:

  1. Architects
  2. Contractors
  3. Developers
  4. End-users

Each group of target audience needs different information about the same products. They don’t want to read the information that is for another group. For example. A Contractor doesn’t care about the insulation data of the product while an architect does.

We have decided to make a homepage where we give 4 options of groups to choose from. So when you choose architect you go to company.com/architect of you go to architect.company.com. The pages that follow (about products) contain just information a architect needs. Like CAD-files and color schemes.

I have 3 questions.

  1. How do you call a homepage that with segmentation options on it
  2. what is SEO friendly? architects.company.com of company.com/architects
  3. I wan’t some example pages to show to the company I’m working for. So please if you know a company that has a homepage where you choose what kind of user you are, share it with me.

One example I found:
www.wisniowski.pl/en