Easy Clean is basically a knock off of one step, they are chemically and practically very close. I've never had issues with either one. Though they are technically not classified as a sanitizer, most homebrewers use it for this purpose and it seems to work well. An iodine or acid based sanitizer, such as Iodophor or Star San, is theoretically more effective. These types of sanitizer can also be saved and reused, while one-step or easy clean will lose its effectiveness after just a couple of hours.
As a cleaner, One-Step and Easy Clean are not very effective when compared to other cleaners such as PBW.
Hope that helps!