"Please note" -- not "please be noted" -- is a modest and polite way of calling someone's attention to something. "Please be advised" is more formal, unrelaxed, and legalistic. Sometimes it is used to convey threats: "Please be advised that our company will be forced to file a lawsuit if your company continues to do X." But it can also be used in a non-threatening way, but still usually sounds a little uptight or formal: "Dear colleagues, please be advised that I will be on vacation next week and so I cannot attend the meeting." Often, "please be advised" is unnecessary surplusage. The previous sentence could be simply: "Dear colleagues, I will be on vacation next week and so I cannot attend the meeting."