Over G Fighter graphics are generally poor - while the aircraft models show some love, the overall look is the one of an average PS2 game upscaled to HD.
In terms of cockpit fidelity, Over G is the best of the bunch. Also, this is the only game on the Xbox360 in which dogfight mechanics could be called realistic.
ACE COMBAT 6
Ace Combat games never tried to be realistic. Fictional countries. Spacecraft-like boss-vehicles. Unlockable sci-fi aiplanes. Unlimited weapons. This is a shoot'em-up dressed like a flight simulation. But it is a good shoot'em-up. Graphics are beautiful, partially due to extremely good filters, frame rate is superb and some of the sceneries are jaw-dropping. The game is fast and fun, provided you can stand the fictional environment and the extreme cheesiness of the useless cutscenes. Multiplayer is chaotic but relatively fun.
For my tastes, this game could have been a lot better with a non-fictional environment and a mission editor. It is a good 3d shooter with some brilliant in-game graphics and a Gundam-like flavour.
Ace Combat 6 visuals are good, and the graphics engine is extemely fast even if the sky is crowded by missiles, planes and explosions...and huge sci-fi boss vehicles.
TOM CLANCY H.A.W.X.
Tom Clancy games on the X360 have been generally good and realistic, like Ghost Recon or Rainbox Six. This is not. This is an Ace Combat clone with real-life photoreal scenery and a fictional (and not really believable) story set in a near future. The only addition to Ace Combat mechanics is the possibility to switch to a "close combat" mode which is disorienting and adds no value to the gameplay. Graphically the game is good, but Ace Combat is better.
What was really disappointing for me was the fact that the Tom Clancy brand was a trademark for quality and realism, so I had (limited) hopes that HAWX could have been a good compromise between realism and fun. It is not. It is just an AC6 clone with the Tom Clancy name attached.
H.A.W.X. cockpit look flat...and they are not much functional to the game mechanics.
H.A.W.X. graphics don't look bad on still pictures... But, in motion, Ace Combat 6 looks definitely better.