Is there a difference between the old Maslow kits and the new Maslow kits?

I’m not sure if this is the right place for this question but Are there any differences between the older Maslow kits without a z axis kit and the newer ones with the z axis kits other than the z axis?

There was very old kits that had brackets to mount the chains. They were replaced with the ring.
The z-axis was optional but since everyone wants it they are part of the kit now.

Thank you!