I’d like to to buy AVAST Endpoint Protection - 40 licences and AVAST Endpoint Protection Suite - 5 licenses

The question is:
Can I use one Small Office Administration Console for manage both?

I can see that there are separate download links for Endpoint Protection

http://files.avast.com/iavs5x/setup_console_ep.exe

and Endpoint Protection Suite

http://files.avast.com/iavs5x/setup_console_eps.exe

If I can use only one, which one should I choose?

No you cannot.

Every avast! console only manages a single product. You need a console (ASOA or AEA) to manage avast! Endpoint Protection (40 machines) and another console (ASOA or AEA) to manage avast! Endpoint Protection Suite (5 machines).

If you want a single console (ASOA or AEA) to manage all your machines (45), you need to buy 45 avast! Endpoint Protection Suite licenses.

Thanks for clarification.

One more question:

Can avast! Endpoint Protection SOA and avast! Endpoint Protection Suite SOA be installed on one machine or better not?

You cannot install two ASOA consoles on the same machine, you need two machines, one per ASOA.

All clear. Thanks again.