(adsbygoogle = window.adsbygoogle || []).push({}); See its hard to choose because Attack helicopter is basicly like a pavelow but without the two turret guns and less armer.But harrier strike is two in 1.Its and airstrike and a hovering harrier.
-My best advice would be to put danger close pro on an attack helicopter(if you have danger close pro)and watch the kills just stack up.-A harrier is much easier to blow up and stays in 1 position.
-SERIUSLY TRY it.ATTACK HELICOPTER with danger close pro=instant AC130 or chopper gunner or whatever your next kill streak is.

-Rep if my advice helped YOU

Harriers are lot better just as everyone else said its a two in one combo and I can recall numerous times when a chopper attacked me and I and I didnt die, the harrier also seems to target people and get kills faster for me