3 Kill Streak
Shows enemies as red dots on radar.
Radar "sweeps" showing locations every few seconds.
The more Spy-Planes up, the faster the sweep.
Does not show enemies using Ghost.
Can be shot down.
8 Kill Streak
Shows enemies as red arrows on radar, so you can see which direction they are facing.
Radar is in real-time, so there is no "sweep"
Shows enemies using Ghost.
Cannot be shot down.