rharry the newer 2010 announced figures are for the Battle of Somme 1916. Good stuff! These are figures 23011,13,14,16,17,18,19 and 20 along with the 23015 Vickers Machine Gun and 23021 Royal Field Artillery 18 Pound Gun.
What I did was pick up at this point as the prior figures never seemed to have any cohesion and so I stayed away from them. I always felt there was no serious efford put into WWI prior to the Battle of Somme releases.
Also, the releases prior to 23011 are for 1914.
Things have change now for the better....
It seems that with the release of the first of the new figures, the Vickers and 18 Pound gun WB is now serious about WWI.
So, if you pick up from 23011 and continue forward you'll have a very nice Somme display in time. This is what I am doing.
I think the difference in color you mention betwen 23011 and 23018 is just seen in the photo reproductions.
Donnie