Adobe Acrobat Pro/Standard offline installers differences and licensing

I am trying to figure out the way to get the offline installers of Adobe Acrobat Pro and Adobe Acrobat Standard (Continuous Track).

I found out the link https://helpx.adobe.com/acrobat/kb/acrobat-dc-downloads.html which provides urls to installer files for both products. It seems to me that Pro and Standard urls point to the same location. So my first question is: Is there any difference between Pro and Standard in terms of its installers? are those unified and the differences can be seen only while logged in to app or when app is activated?

It looks to me that these installer links are not versioned. I mean links point always to the latest released version. After unpacking zip file I can see the latest available patch inside and Acrobat Pro/Standard gets installed in such version. How can I easily track updates in here? Is there a way to get older Pro/Standard installers? Or is it always the same app with latest update (*.msp) on board?

The next thing is that this links seem to be links to the trial versions of Acrobat, are there any differences between trial's an full licensed version's installers ? Here: https://www.adobe.com/devnet-docs/acrobatetk/tools/AdminGuide/licensing.html#licensing-a-trial there is specified that: 

The trial version includes all desktop features of Acrobat Pro, plus a limited set of Document Cloud services including the ability to fill, sign, and send forms on a tablet device, store and share files online, and access recently viewed files across devices.

I can see that there is a way to license the trial, so I assume these are the same in terms of binaries. Is it true? What will happen if I managed to upgrade already licensed Acrobat using trial installer. Will it persists its activation or I will end up with update app but in the trial mode? 

https://helpx.adobe.com/acrobat/kb/acrobat-dc-downloads.html here it also states that:

If your organization has purchased an Acrobat license via an ETLA (Enterprise Term License Agreement) or VIP program, you can download the installers from this page.

Does it mean that these trial installers cannot be used when using Individual, Business (Acrobat for teams) or Students & Teachers subscription? Base on this page: https://helpx.adobe.com/download-install/kb/acrobat-downloads.html that is true, and for Individual, Business (Acrobat for teams), Students & Teachers there is no offline installer, just online?

Thanks in advance for your help.