Ability to copy 2 different edits.

Then the selective Copy / Sync Settings route is the cleanest way. In Develop, go to Settings > Copy Settings (Ctrl+Shift+C / Cmd+Shift+C), tick only the edit you want to carry over (for example Exposure), then move to the target image(s) and use Settings > Paste Settings (Ctrl+Shift+V / Cmd+Shift+V). For several targets at once, select them in the Library grid and click Sync Settings, then check only the adjustments you want to copy. That way only that one edit is transferred instead of the whole set of adjustments.

If I understand correctly there are multiple original images. And two different types of edit are to be maintained for each one (perhaps, you are creating sets for two different purposes).

My suggestion would be first, to have virtual copies for each image that have membership in different Collections dedicated to one or another edit set (or, that are distinguished by - say - a colour flag, and that can then be used to filter your images down to just one set, or the other).

Then it is helpful to understand the nature of difference between one editing set and the other. Is there a particular difference of “look”, or what, and can this difference be achieved by applying different adjustments, other than the basic editing tools. If so, that suggests some very efficient strategies.

Here I find it helpful to think of input referred editing, and output referred. Exposure, White Balance and such basic settings need to vary between images because of differences arising in their capture: the camera settings, the lighting, variations in the scene and subject.

That kind of processing needs to be individualised to get to a certain technically optimal baseline. To really see what the image has got and what it can do, perhaps. And that ‘normalised baseline’ will tend to be somewhat the same for any image, when we discount particular aesthetic considerations.

LrC has different tweaking adjustments such as Color Grading and Tone Curve - also Masking type adjustments - which operate independently of those used for a ‘technical edit’ in the sense above. They follow on after those in the processing chain and can therefore do so in the working sequence too. They might apply a certain common moody or retro (say) look / character, to non-destructively overlay all these images’ basic editing.

Set 1 might lack this overlaid look, or might have a different look applied instead.

By using distinct adjustments JUST “look 2” can be easily saved into a preset. This preset should un-check all the Basic Panel stuff: should leave that unaffected.

OR without making a preset: one can highlight the image versions concerned, turn on Auto Sync, and use (say) Tone Curve to tweak the tonality subtly across all of these together, and/or the hue response - use Color Grading - add a Masking based adjustment -  whatever.

And if THEY later change, Basic adjustments can be also synced across all a given image’s editing treatments, ‘underneath’ - leaving intact - their varying overlaid looks. 

ALSO: if it is necessary to vary a duplicated set of image versions using one of the more Basic adjustments - not these other independently applying ones - that can be done using AutoSync in the Library module’s Quick Develop panel. So once all the images’ Exposure (say) has been individually set, this lets them all receive a further +0.5 stop Exposure relatively. They are not all synced to a common absolute Exposure value, as they would be if you did this in Develop.   

One more thing to say. In Print there is the opportunity to apply on-the-fly a Print Adjustment either of brightness or contrastiness. So that can be included (or not) in alternative saved print setups - either printing to device or to a JPG - and perhaps remove altogether the need to maintain different editing versions within the Catalog. That pushes the “look” even more into being purely output-referred: just the same as when a certain image resolution or colourspace is needed as the form of output.

Snapshots are exactly what you're looking for: in the Develop module, open the Snapshots panel on the left and click the + icon to save each version of your edit (e.g. "Version A", "Version B"). Clicking a snapshot instantly restores that exact edit state for the photo — no presets needed, and it only lives with that image. If you want to see both edits side by side, you can also create a Virtual Copy (right-click the photo → Create Virtual Copy) and apply the second edit to the copy.