The cover is lilac.

The only differences I've spotted are obeli added to various Waterloo
served stations, and Cambridge North. There is no indication that there
are hardly any trains serving both Cambridge North and Waterbeach, which
somewhat defeats the point of a map at all.

I just noticed that the Thames is on the wrong place on the front cover,
showing a swathe of London south of the Thames from Hampton Court to
Staines... presumably it's been like that for years? Also, the map used
to go to Exeter, but it now cuts off at Yeovil. A quick rummage tells me
that the change was some time after 2006. I wonder why. The 2006 map
seems clearer on both sides, even if its insistence on showing the
Cotswold line all the way to Hereford but cutting off the GWML before
Swindon years after NSE ceased to exist seemed a little brain-damaged.

I'm wondering why there seems to be no similar map for any other part of
the country. Is ATOC or whatever it's called now legally obliged to make
such a map for (most of) the former Network SouthEast area, but legally
allowed to ignore the provinces? The only other half decent map I've
found is the one GWR produce of their territory, with an overview of
Britain on the back.