CoD:MW vs CoD MW2

Found from Amazon comments, simplified well...

Call of Duty 4: Modern Warfare

Networking: Client/Server
Avg Ping: 25-40ms
Console Commands: Yes
Lean: Yes
Custom Maps: Yes
Number of Players: up to 64
Competitive Mods: Yes
Mod Tools: Yes
Ability to Record: Yes
Kick/Ban Hackers Immediately: Yes
Profiles Saved Online: No
Manually Select Server to Join: Yes
Control Bad Language: Yes
0 ping Advantage for Host: No
Lan Play: Yes
Free Demo: Yes
Price: $50


Call of Duty Modern Warfare 2

Networking: Peer 2 Peer (downgrade)
Avg Ping: 100ms+ (downgrade)
Console Commands: No (downgrade)
Lean: No (downgrade)
Custom Maps: No (downgrade)
Number of Players: up to 18 (downgrade)
Competitive Mods: No (downgrade)
Mod Tools: No (downgrade)
Ability to Record: No (downgrade)
Kick/Ban Hackers Immediately: No (downgrade)
Profiles Saved Online: Yes
Manually Select Server to Join: No (downgrade)
Control Bad Language: No (downgrade)
0 ping Advantage for Host: Yes (downgrade)
Lan Play: Yes
Free Demo: No (downgrade)
Price: $60 (downgrade)

[EDIT: TheComputerGamer]
Also would like to add...
MW2: lacks Anti Aliasing over 4x
MW2: has an actual 'Xbox Live' error in it.