[The Duke]

It’s really hard for me to imagine the U2 being a better asset than the Global Hawk. (Maybe the U2 flies higher and has a larger field of view?)

[U-238]

It comes to cost and other measures the USAF to compare the two.

http://www.aviationweek.com/aw/generic/story_channel.jsp?channel=defense&id=news/awst/2012/02/06/AW_02_06_2012_p34-420189.xml

[magellan]

It’s really hard for me to imagine the U2 being a better asset than the Global Hawk. (Maybe the U2 flies higher and has a larger field of view?)

The Global Hawk costs more to purchase and more to operate.