Original is always better than duplicate. No matter how good duplicate looks from outside, sooner or later it will fade out. This goes for relationship too. Do not pretend to be other that your are not, always Be Yourself. Never put a mask to hide the real you. You cannot pretend for long and change yourself completely. The outcome of this will tremble your relationship.
So whenever you are getting into a relationship, be honest with each other. Do not pretend to be what you are not in order to impress other. Let people love and admire you for what you actually are.