system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How different are each and every sperm? Everyone is unique, but would a different sperm from the same man really change child anything close to drastically?
gpt
One sperm vs. another sperm would definitely change the child (as would one egg vs. another egg) but "anything close to drastically" is in the eye of the beholder.

The children produced from two different sperm from the same father would be very similar and have many of the same genes, but they would be as different as any siblings you know. They might be practically twins or they might not even look particularly related.

If "as different as two siblings" is "close to drastic", then there's your answer.