The differences are as follows:

Open WeChat, select a contact, and send him a message with any content. If it shows that you are not his (her) friend yet and you want to add him or her back, please click "Send Friend Verification" to indicate that the friend has been deleted by the other party.

If it shows that the message has been sent, but the rejected party has rejected it, it means that the message has been blocked by the other party. After being blocked as a WeChat friend, both parties still exist in each other's WeChat, and the WeChat friend relationship between the two people has not been terminated.

When the blocked person sends a message to the blocked person, the message displayed is reject. Unless both parties delete each other from the blacklist, if either party is blacklisted, they will not be able to receive the verification message.

Deleting a friend means that two people have terminated their friend association, and the WeChat friend of the deleted party will no longer appear in the WeChat list. However, the WeChat account of the deleted party is still in the WeChat list of the deleted party. If you send messages to each other, you will be prompted that you are not his friend yet, please send a friend verification request. If you block someone, you will not receive friend verification, but you can receive it after deleting it.