>>7532141and for completion's sake here's a pic of the rest. As mentioned new hips for each limb bot and you also get the shockwave gun and the flight stand adapters for Vortex and Blast-Off (no actual stands though).
I forgot to take pictures of the individual weapons, but you get everyone of them and can combine them into the big one for Bruticus.
Also I forgot to mention the crotch armour when talking about the original's tightness. You can basically pull it apart (needed for making a trailer out of the combiner parts), but it's so incredibly tight that I've only managed to do it once. That problem doesn't exist on the KO.
TLDR: The KO has some issues, mostly QC, but overall is comparable and in some aspects arguably better than the original. If you can get it for a decent price I'd say it's worth it
If there's any questions left feel free to ask