Flag

Both are thrillers about the military, conspiracy, politics, and the interest of groups into a militarized society and war. Both include the use of fairly realistic, first generation mechas. While both feature UN missions, Patlabor deals with the aftermath of such a mission within Japan's domestic security services, while Flag is about an active mission inside a civil war ridden Asian country. Both flesh out the characters of the team working in the mission very well. 

Both main characters are watchers who follow the events in the world as they transpire. Both have a unique storytelling feel. Flag is found footage, Kino is like a storybook. Both explore similar themes such as death, war, purpose, and what it means to 'watch.'  

Both shows are slice of life with an all adult cast who are working as professionals in a military environment. For Flag that's UN blue helmet peace keeping, for Rescue Wings it's helicopter rescue. Both stories are un-agitated, relatively slow paced and highly realistic. Both shows also have romantic subplots for the MC, in an equally realistic and pragmatic style. Flag leans a little more towards shounen type dramatization and action, yet both are highly realistic depiction of the routine and "backstage" sides of military jobs.