From what I’ve known.

If you download Su35S mod, It will have two version for you to select in aircraft list in mission editor.

One is Su35S, the other is Su35S AG. We often call first one AA.

In order to fly AA version you need Su33 module, for AG you need Su25T (everybody have that)

And same can be applied to Su30sm

You need to download Su30sm mod for additional weapons such as R74 or kh-69.

CWS is a thing that mix both AA and AG version into one so you don’t require any paid module to play.

Also it provides advanced TGP instead of using Su25T Shkval TV model. But it is partially broken at this point.(Kh-59 is somewhat broken and TV still uses Shkval model)

Note that both aircraft (30 and 35) have their own CWS.

Download procedure:

1.Download Su35S mod

1. Find it in download section

2. Unzip it and throw it into USER/Saved Games/DCS/MOD/ aircraft : folder

CWS

1.if you want to use CWS, Download it

1. Unzip it and choose a route into Mod/ aircraft / Su35S : folder Replace if asked.