Windows 10: Fresh install. version 2004 or 20H2 v2?

I must install a new copy because using the Desktop for testing software, policies, and display settings left me with numerous problems of my own own making. The releases of both versions were downloaded about three weeks ago.

Which should I install?

:)

 

Windows 10 version 20H2

I down loaded windows 10 version 20H2 and now many games I play on FB are VERY slow. The games worked ok on version 2004. Question if I down load version 2004 will it override version 20H2, or do I need to remove version 20H2 prior to downloading version
2004?

Thanks.

 

Windows 10 version 20H2

The computer in question had Windows 7 on it and there was not an option to uninstall the 20H2 update. So I have reverted back to Windows 7. Is there a way to download and install Windows 10 version 2004? The games will work on that version but not the
20H2 version.

Thanks

 

Straight to Windows 10 Update, Version 20H2

I've never downloaded the version 2004, since people said that it's bugged. And I only use my phone as the main source of data connection. Now then there's another new update, version 20H2.

My question is, does update 20H2 covered up the version 2004? Like the update 20H2 already had the 2004 In it?

If it does how much GB will I consume downloading the update?

I've heard that update 2004 size is 4GB, Is the update 20H2 file size is another 4GB? or just 1GB?

Please do tell me the total file size.. Cause I really, really have a limited internet connection.