StonerMk2: Ah i see. I love the DoW games, own the collection and still playing through them. Though my personal favorite is either Winter Assault or Dark Crusade. Will definitely have to keep a eye out for that Gold collection for CoH. Sounds like it be fun, especially if its like DoW.
Azarr: Err.. CoH is more like DoWII. Just on a slightly larger scale.
Anyway, if you want to find out if it's anything for you, you can always try Company of Heroes Online first, considering it's F2P.
Of course there are differences, but the overall gameplay is pretty much the same.
You can always buy the CoH and the expansions if you are more interested in the campaigns or the two additional factions.
Actually I think Company of Heroes Online has the original singleplayer thrown in for free.