Battlefield 2 vs Company of Heroes 2
Battlefield 2
Battlefield 2 is one of the Battlefield classics and rightly so. The game lets you play as a soldier in one of the three major military superpowers: the United States, the Chinese or the newly-formed Middle East Coalition. Players will have access to a wide range of weaponry to do battle with as well as a variety of vehicles. Similar to the original game, the game has a large-scale multiplayer mode - the hallmark of any game from the main Battlefield series - that can accomodate up to 64 players on a single map.With more weapons and vehicles for you to play with, Battlefield 2 is a pretty nice sequel to the Battlefield franchise. However, considering that it has not yet been reworked, unlike the first Battlefield, and that currently, there is no way you can purchase the game unless you get the hard copy off eBay or a similar site, you might be better off buying any of the other Battlefield games.
Company of Heroes 2
Company of Heroes 2 is the exciting follow-up for the original Company of Heroes game. Set in World War 2, this game is rather multiplayer-focused but it does provide players with an intense single-player campaign which also double as a way for you to be familiarized with the gameplay before heading into multiplayer.The game does have a lot of "standalone" DLCs that adds either a new single player campaign to the game or a new multiplayer army for well... the multiplayer gameplay which you'll have to buy if you aim to get a "complete" version of the game. This kind of make the multiplayer aspect of the game rather pay-to-win since players without the new multiplayer standalone, which usually features a new army that's slighter stronger, will probably be on a disadvantage.
All in all, Company of Heroes 2 is still a great game from a great franchise, but it seems like the developers/publishers may have lost some favor with its player base mainly because of the slew of "standalones" that players have to shell more money for in addition to the "base game".