I've just finished going through the tutorials for CC3 and I've used Dundjinni quite a bit. Here are my thoughts:
1. Obviously Dundjinni cannot do overland maps (there is the campaign pack but it appears to have problems and can only do close up maps). I was able to put together a very decent overland map in about 20 minutes using the CC3 tutorial. Since you can zoom in and out with no degredation of quality, the same map can go from continent, to country, to regional, and back.
2. For the floorplan building, I did find Dundjinni a little easier to use, but a lot more restricted. The quality of the CC3 maps vs. the Dundjinni map are about equal, especially when you incorporate the DJ art in the CC3 program. One major difference was in the time it took to put the map together. While I mentioned that DJ was easier, CC3 was actually quicker due simply to the difference in performance between the two packages.
3. I have one major problem with Dundjinni. After many months of using the package, one day when I tried to load it, I got an "improper installation" error. I went through the 14 page thread on their message boards regarding this problem but none of their suggestions solved the problem. It has been many months since a new patch or art package was released so I'm not certain if this problem will ever be resolved. What it means for me is that I had to install it on a different (and much slower) machine since it refuses to run on my current one (even though it used to). CC3 obviously doesn't have this problem and ProFantasy has always had good reviews regarding their tech support.
4. Finally, CC3 has none of the silly license restrictions on their art that Dundjinni does, so it you have any thoughts of commercially publishing your maps the desicision should be easy.
I'm working on writing up a full review of CC3 in the next week or so.
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