Can you please be more descriptive with your request and a little bit less rambling? That may sound insulting but this post is a little non-nonsensical, especially towards the end. This is what I think you're saying: "Is there a way to compare the graphical cvars of C2 to C3?" and "how do I dump cvars in the commandline?"
I'm not sure if dump is a technical word here, and I'm not sure what context you're talking about. Do you mean input cvars, and if so, do you mean in-game or in the editor? If you meant: "How do I input cvars in game?" you simply press the "~" key and the command line will drop down and allow you to input certain allowed variables.