PW Manager and CSS Questions

[Bánh mì]

Am I correct in that Thinkpads (x201 era) shipped with a reduced mode version of CSS installed and this only activated PW Manager -- but not the other features in CSS?

IF I want to upgrade PW Manager I can do so?

Do I need to upgrade to CSS 8.33? What would be the reason do so?

Get confused on the differences between the two and how PW is a subset of CSS.

Please clarify!