Blind Eye really only hides you from AI-controlled air support and things like sentery guns.
Cold-blooded really only hides you from User-controlled air support, attachments, equipment, and things like sentery guns.
If an AI is controlling a sentry gun and you have on Cold-blooded, then the sentery gun will shoot at you.
If a User is controlling a sentry gun and you have on Blind Eye, then the sentery gun can see you.
Think of it like this way:
Blind Eye is for all AI controlled killstreaks.
Cold-blooded is for all User controlled killstreaks, attachments, and equipment.
I hope that helps.
blind eye only protects you from hunter killer, swarm , stealth chopper and escort drone.
coldblooded from mms,TF (to some degree) dual band, sensor grenade, hellstorm missile, lightning strike, lodestar, vtol and that worthless lil user controlled drone.
it will also will only make you not show up on the oponnent screen but you can still die if a team member is right next to you lol
Cold blooded just keeps you from having a red target around you during human controlled score streaks, and you don't show up with the red diamond on those annoying target finders. You know, because people need to be told where to aim their own gun.
I find Blind Eye to be useful, as there are always Hunter Killer Drones out there. Deaths by lightning strikes is reduced big time too, just depends if you are around teammates or not. Not having to worry about a Stealth Chopper is always a plus too.