I can't agree with that generalization, Africans can be very easy to keep. In my area the tap water is more suited to Africans then New Worlds.
It is actually very difficult to say which is better because there are so many different types. It's best to discuss what you are looking for. They all have something to offer. You need to start reading up as much as you can to get an idea, and see what you like. Did you already have a tank or are you purchasing everything new? Is there anything particular that you have in mind as far as decoration or type of aquarium (species, community, etc)?