How quickly can your competitive advantage erode? A Wall Street Journal article detailed the steps that Facebook and Google’s Gmail are taking to customize their features to look more like their their competitor. Changes to status updates, email inbox and their respective layouts are starting to erode the competitive advantage between the two companies. It appears that once one company started to cross the design lane that separated the two, the other company moved immediately moved closer. Competitive advantage is not a protective blanket if it can be easily duplicated. Real competitive advantage needs to have a serious moat in front of a castle. Force a competitor to swim across and try to scale the walls. If you have a well designed competitive advantage then you will force another organization to expend significant resources to try and challenge your position.