From Ke'ila to the wilderness of Zif, David pursues the Philistines ; Saul Pursues David. David defends the country even while on the run; Saul is consumed by his fear and loathing of David. 
David has an Efod. He consults with God; another contrast to Saul.
After the massacre at Nov, Ke'ila and Zif are afraid for their fate, and inform against David.