linux accessibility and different desktops for a total

I am a totally blind computer user, familiar with the following =
platforms:
windows
Macintosh, Tiger and up
ubuntu linux
Fedora linux
and as for desktops with linux I have used gnome and mate.
I hasten to add I am no programmer, just someone who write's text files, =
checks e-mail, and reads articles on the internet.
Since I use orca and use keyboard commands and no mouse, for a total, =
what is an advantage of one desktop over another?
I would welcome anyone's thoughts as to why one might favor the k d e =
desktop over another.
I had thoughtt that prefering one desktop over another would mainly have =
to do with its appearance for sighted users.
Also, why is the k d e desktop not yet as accessible as others?=