I was a little surprised, however, to discover that they had two types of Early Grey: black and green. OK, well I'm up for experimenting with Early Grey so I bought both.
What's the difference between green Earl Grey and black Earl Grey? Well, this is:
Marx has got the green, Gandhi has the black. You probably figured that out yourself, I guess. Gandhi tastes like Early Grey and Marx tastes like some kind of floral syrup. Marx also has the property of looking like dishwater when milk is added to it.
Oh well, only another 24 of the green to drink and then I'll be rid of it.
I got the mugs as a random reward for speaking at a games conference a few years ago, by the way, I'm not some kind of collector of revolutionaries-branded drinkware.