They look alike, but they are very different when u take a closer look.
JC on top, NG at bottom
JC has got the right sized radome
Prefer NG's cockpit window print which is brighter. Notice some of the stars with JC are in purplish colour while NG's all white
JC has oversized engine
Great details on NG's fan blades, while JC's one can spin
JC's got the correct width size for main wheels. NG's too tiny. Both are fixed wheels and can not tilt
JC's plane is sitting too tall and all its stabilisers are made of plastic