What is the difference between Tylenol extra strength and Tylenol 3?

Tylenol Extra Strength is 500mg of acetaminophen only.

Tylenol #1 is 300mg of acetaminophen and 8mg of codeine.

Tylenol #2 is 300mg of acetaminophen and 15mg of codeine.

Tylenol #3 is 300mg of acetaminophen and 30mg of codeine.

Tylenol #4 is 300mg of acetaminophen and 60mg of codeine.