It depends, if you like super-realisim then Red Orchestra is a definite yes, along with a great game that includes tanks and all types of weapons such as artillery you can download a few mods, Mare Nostrum which puts brits, italians, aussies, and the desert rats in the game fighting over north africa, and the Carpathian Crosses which puts in Romanians while fighting in the normal theatre.
On the other hand Dod:S is a more cartoony less realistic take on world war two, it includes only infantry but is a much more forgiving game. If I had to make comparisons it would be like Dod:S is CS:S whereas Red Orchestra is Insurgency.