You have two groups of four, each group sharing an identical 'border' motiff around the aperture. That the motiff is identical, we'll assume the same artist/workshop created them. Did the same artist/workshop create both groups, look closer for any similarities for the answer, as I will do.

In my experience (also a working hypothesis) viewing pics of various cloisonnewares, scroll work (minus ANY clouds in the background) and clouds that are filled in with enamel are associated with the oldest cloisonne.

A gold wire depicting a single cloud is current into today - whereas, a solid cloud of color has been all but abandoned from the art.

While these are 3 clues as to age, just may not apply to the large beads, where are the cloisonne researchers, are there any other members here with opinions on age?

All the cloisonne share a new appearance, may be due to much care/protection given from previous owner's and not due to their being modern as any clue. Again, in my past observations that the cloisonne with scroll work - and - the cloisonne where the clouds have solid color are the oldest, while, the floral cloisonne with gold wires depicting clouds to be modern, even if now vintage.

If false, then would venture that a modern artist paid tribute or inspired/challenged to work in the older, more classic styles/motiffs.

Pic attached is another large cloisonne that has scroll work, and there are no clouds placed in the background. While pic #2 a large cloisonne has clouds that are filled in with enamel. Using these clues alone can conclude both are old. Short of this explanation, wait to hear from other's or someone to share comparable observations or will be first to admit to being no authority and would be honored to learn the ways/methods used to date cloisonne.