It ain't called a "Queue" for nothing. :-)
You can add as many items to the Render Queue as you like.
I suggest you read the help. Really, reading your headline made me do weird facial acrobatics here. These are basics and the ironic thing is that you are asking about something that has been doable in AE for the last 15 years when Premiere only recently got such a feature...
And I'm sorry to offend the experienced with a such novice question, Mylenium.
I get where you're coming from though.
I have tried it...but haven't found a way to get it to work. I was taking an AE project that had "part 1" for example and adding to the queue, then editing it to add diff version - "part 2"....and adding to queue. But it only would export one version. I tried to create a new sequence but it's an AE template from vhive and haven't gotten it to work with a new sequence.
I'll figure it out thru another resource, no worries
You have to use different comps or set different time spans in the same comp to get two versions of a render. Any changes you make in a composition before the render are used by the render cue. The render cue does not remember different states of the same composition.
I hope that is clear.
It's easy to duplicate a composition to make changes. Just select it in the Project Panel and press Ctrl/Cmnd d.
No harm intended. Classic case of incongruent terminology. As Rick said, you need to decouple your stuff by genuinely duplicating it in teh project window along with any related upstream/ downstream items like nested comps and shared assets that you may wanan replace. AE has no "history states" or layer comps like Photoshop nor does it any sort of other built-in versioning. Wihout separating stuff, anything you do will ripple through the entire project, no matter how minor.