(COD) difference between sr-71 and spy plane?

Wats the difference between a sr-71 and a spy plane?

PS: if it helps im speaking of black ops!

if i remember correctly the SR-1 shows enemies in real time while the spyplane does not

That and a SR-71 can't be shot down.

Or to get really in depth the spy plane was unmanned whereas the sr-71 was pilot controlled.

Spy-Plane:

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.

Blackbird:

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.