As I mentioned in an earlier thread, there are some noticable differences between a kit I received recently, and others from earlier this year.
The first obvious difference is the internal packaging. The head and tail are still packaged in the same labelled bags, but each are collected together in a neat way.
It's as if all the bags of head components have been neatly laid out on a ~30cm square plastic sheet; another sheet has been placed on top; and the two sheets have been heat-sealed around all the individual bags. Hence you can see exactly what you've got for each assembly; they're organised; and kept separate.
IIRC, there's head; tail; frames; & frame spacers/hardware in separate packages.
One downside of this is that you now seem to get just the parts you need, whereas previously there seemed to be a few extra bits. This was useful as there were some extra shouldered linkage balls, which are required for the beginner head settings.
My kit came with a new-style (OT BL460 1700kV) motor included. Kit was priced as the previous ones that had no motor.
The head has a number of changes.
Different flybar paddles. These have two mounting positions, and are narrower and longer than previous ones.
Flybar carrier end castings have been modified to remove flybar end-float present in earlier kits.
The linkages seem different. In earlier kits these were very tight unless reamed. These now seem pretty much just right (though that's subjective). They're very slightly tight, as if they'll wear to a perfect fit. (G5 has steel balls, except on fly-bar carrier.) They also feel like they might be made from a different (harder) plastic.
My head seems to have gone together nicely. Smooth & relatively slop-free - without any clever fettling on my part (as if...)
No more green dampers. Which is apparently for the best...
Dunno if there are any other differences, as I bought it to get another head. Frames look the same to a casual inspection. I may put the tail assembly together and see if anything's changed there.