Following that logic we would have 8 different installs of DCS currently. Also it is a fallacy, because in order for modules to be compatible between the two, they both have to be using the same code version.
So basically what seems to be doing is Duplicating DCS - just for providing Alternate GUI's. It doesn't make sense to me at all. There are better ways to distinguish between the Two products than to have 2 installs that are 99% the same.
IMO (not that that means much) WW2 should be following the modular approach we already have, with maybe it's own GUI resources as part of the WW2 module for the DCS core. Start with the DCS:WW2 icon? Arrive in a WW2 GUI customised for WW2. Start with DCS World Icon, arrive in the GUI we have now.
Each GUI will allow switching between both modes. This Would affect what is available in the ME too, related to time period. With another free for all mode, where anything goes, all modules and Time periods enabled for selection.
It has already been said that this will sort of be possible in either World or WW2 so why would I want to install both? Why separate them? It would be better to have them auto select WW2 or other GUI, on install depending on what the user believes they are downloading. DCS remains the same underneath.
Nate