I have had the Nero one, never heard of the other chain tho!

I find hot chocolate as a rule in North America is far sweeter than in the UK - sickly so in fact. I like dark, rich hot chocolate, and the closest I found was for a limited time when Starbucks (I think, could have been Second Cup) did a dark hot chocolate shot. I don't like Second Cup's regular hot chocolates, Starbucks is ok, but I add raspberry syrup to make it a different drink frankly (and skip the cream, make it with skim milk, have it extra hot, with chocolate curls!)

If I want real hot chocolate, I make my own - 70% good dark chocolate, milk and cream on the stove, shot of alcohol (Bailey's being the house favourite, Cointreau for a Terry's moment!) optional! Green & Blacks is reasonable as a packet option, and I will admit that the 'luxury' Options comes home with me in a suitcase for an at work sweet fix (although it is not comparable to good, counter made hot chocolate).