1968 Clothing booklet that is transitional

I own dozens of Barbie booklets from 1959 to 1999 and sometimes notice details in them that others may not have.  This post is going to be about two booklets from 1968.  The first booklet is called The World of Barbie Fashions and is dated 1966.  I believe this booklet was meant to be transitional, as some of the items in it are from 1967 but most of them are from 1968.  However, the talking dolls are not included.
The second booklet is called The World of Barbie Fashion Book 1 (there were actually several of these), which is dated 1967.  Everything in it is from 1968, and the new talking dolls are pictured.  The covers of these two booklets are slightly different, but what is really funny are the clothing variations I am going to show you.
The upper booklet in each photo is one dated 1966 and the bottom one is dated 1967.

The top booklet shows Melody in Pink Tutti
while the bottom shows Stacey,
the standard Tutti and Chris.

The bottom booklet has added Twist N Turn Stacey.

I don't know what happened to the color
of Night Clouds in the bottom booklet.

Here are two equally funky
pairs of sunglasses for Culotte-Wot?

Did The Silver Cage come with
two different pairs of stockings in the actual package?

Not only are Skipper's outfits pictured from booklet to booklet,
note that the early swimsuit is pictured with striped panties.