Better, combat works more in the favor of those who can use strategy instead of luck, it has maybe a little less in the ways of tech treeing and stuff, but overall I find it more fun.
wtf, the combat isn't even comparable to civ, and if anything, i'd say civ 5 takes more strategy. i dunno why you bring up tech trees, as RoN doesn't even start to compare to civ 5's.
really, to answer flame's question: it doesn't, they play totally differently. if ya like RTSes, then you'll probably love RoN.