First Off, I dont know what is your current ranked ELO, but as far as I know, on mid-high ELO ranked games, both teams have a jungler, by saying so, if the opposite jungler allows you to steal red/blue buffs and other monsters you will be ahead exp/gold wise.
If the other team does not have a jungler, and you have appropriate map control you can wipe their jungle up and that will harm the opposite team because carries usually want to get red buff before team fights, and so do mages with the blue buff.
Take into account that in these mid-high ELO ranked games, usually the teams coordinate up to gank the junglers who usually begin on the blue buff, the map below illustrates the points where the ganks are prepared:
Therefore as your ELO scales up, you should consider alternative jungling routes, the one I do on most of my junglers is the following:
4) Recall to base
5) Blue or Red, depeding on the need for a gank and in current gold/items
6) By the time you are done with Blue or Red the Golems should have been respawned again, rinse and repeat.