by Thorsten » Tue Dec 26, 2017 12:17 pm
Dependent on the relative quality level (which I don't know) and provided the licensing is GPL V2+, the following options exist:
* if one is very developed and the other very simple, the simple version can be retired to the attic and replaced (that's likely going to happen with the Airbus A-320 and has happened with the Tu-154b)
* if both versions are reasonably developed but in different directions (say one has good graphics, the other good FDM), then
- the preferred strategy is to merge them into one single project
- if that is not possible, they can exist side by side as variants distinguished by a different *-set file
- if that is also awkward, there can be two different projects under different names
* if both are highly developed and merging makes no sense because of different development philosophies, two separate projects are best
The usual path is to try to get in touch with the maintainer of whatever version - in the best case, you can get a lot of help with merging, in the worse case you'll learn quickly whether you need a separate project.