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

Technical Details
1

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?

2

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.

3

Thank you!