Here is a link to what buff dundotte keets look like. There are no buff or buff dundotte keets in those photos.
http://guineas.com/colorchart/color/buff_dundotte3.jpg
Here is a link to what a lavender keet looks like.
http://guineas.com/colorchart/color/lavstrio.jpg
There may or may...
Your first photo shows there are several different varieties but is not good enough to tell what they are for sure. Individual photos of each taken with one looking straight down on top of them and a second looking directly from the side would help.
The second photo is a Lavender.