The 10 Commandments are simular to the Be-Attitudes but they differ by the 10 Commandments saying things that you shall or shall not do, where the Be-Attitudes are telling you what to do and blessing those who do or don’t do something.
You may think that the meaning of poor and poor in spirit may mean the same or simular to the same things. When you take time and think about it they actually can mean totally different things. When you say someone is poor you are referring to them as non wealthy, and not healthy. Someone who you call poor can have a rich spirit, they could be happy and be enjoying life, and believing in God. When you say someone is poor in spirit it can just mean they are sad or upset and don’t look to God like they should. They can be rich and wealthy but just be poor in spirit.