It’s not even close comparing 2.0 to 10.0. Two new races, paladin and shaman opened up (with unique designs) for both factions, the first release of flight, 11 zones (including starting zones and follow up zones for the new races) compared to 5, just Hellfire Peninsula and Zangarmarsh had almost as many dungeons as DF has, and so on.
10.0 is blown out of the water by 2.0. 