Remix your websites, whatever the colours.

So your two different-looking mammoth sites must merge?

Or that critical B2C application should be featured next week in a dozen of subsidiaries' websites?

That's just fine...
Even if their respective content, structure and look are totally different, any two WebMS-borne sites developped with the same Site Grammar ® can merge immediately.

That means, for instance, that any set of pages of a given website can be exported, with all its dependencies (images, movies) inside a different-looking site, in a few clicks.

Better, if the grammars are different, you're not stuck. As long as every WebMS site's content requirements are always thoroughly defined and documented, a secure path of translation, from one site into another, can be designed. So, a CMS-based conversion can occur in a few days.