What is the difference? Just curious how others feel

What would be the difference on having someone you know give you their sperm to make a baby or paying for a donor? You have a better chance that the person you know being around than the person that has no clue. Even if the person you know doesn't want to be around it would be the Same as the person that doesn't even know. If you know the person at least you would know that their background is the truth and not just what they filled out on paper. And for the person that said stop asking the same question....I haven't so thank you.