National Geographic Kids – Just looked through the last several issues and did not see any evolutionary content (though I know if they did an issue around dinosaurs that would be their perspective). However, one thing my kids really like about these may not appeal to everyone. They are not just about animals. Most of it is, but there are sometimes sections about current kid movies (How to Train your Dragon 2), inventions, and other things. In one issue I saw articles about modern day treasure discoveries, real animal rescue stories, another had a page about money, Guiness records (usually animal related), and exploration. As I said, mine love this variety sprinkled in, others may not.
Ranger Rick Jr – it is almost completely animal and nature focused. The depth of information is not quite as heavy, but is good for the ages intended. I didn’t see any evolution in these either.
I think both have beautiful photography. I think the National Geographic Kids has a less ‘quiet’ feel, with splashy color and more ostentatious text blurbs around photos. For us, having both is a good balance.