Thanks for the answers.
If I buy GW it’s to play WWII maps. Of cause I would try WWI, buts that are not what I’m looking for. So far it seems GC has the upper hand, since it also give you the pacific theater.
Two questions remains:
1. Are any of the game engines superior to the other, aka has lesser limitations for future upgrades or modes?
2. Are there mods to both GC and GW that will give me historic accurate German, Japanese and so on flags? I'll not spend a single dollar on a “fantasy” or historic inaccurate game since it takes away the whole play atmosphere and feeling.
Looking forward to your answers, so I can buy it asap. :-)