I haven't yet seen the JC version yet ( in 1/400 anyway!) but for me and in my humble opinion if you like your MD-11's, then the latest Geminijets versions are by a million miles far the best. I've got most of their MD-11's but the last two,ie the KLM and UPS have fantastic well researched detail. Their cockpit windows are the best by far,their engines are extremely well done and minute details like antennae,nose cones etc!! So if you want good MD-11's go for the latest GJ's.
PS: I'm really trying to push GJ to do more MD-11's especially on their Facebook page,but have had no luck recently!!