I believe that Infotec (who make the screens) are retiring the orange LED screens in favour of the newer models (such as those pictured).
This is implied by the 'Last time buy' page on Infotec's website
http://www.infotec.co.uk/2016/Last-Time-Buy
According to their website orange displays are still available the only difference is that they will not be making displays based on single lines of text, instead you will get a display area fully populated with LED's.
Only making one type of display cuts costs and with the way technology has evolved making just one panel full of LED's is probably cheaper than bundling in multiple smaller panels.
This also means that you can still do an old style display if you want but you have flexibility if you want to go fro something different that doesn't include all text, it also allows you to scale fonts so that you can have less needed information smaller so it doesn't use up as much space.