They mean exactly the same. It is a joke because the person thought it was more polite to use 'wuss' because 'sissy' doesn't have a good meaning but of course it still made the guy angry because 'wuss' is also bad and has exactly the same meaning as sissy.
The Language Level symbol shows a user's proficiency in the languages they're interested in. Setting your Language Level helps other users provide you with answers that aren't too complex or too simple.
Has difficulty understanding even short answers in this language.
Can ask simple questions and can understand simple answers.
Can ask all types of general questions and can understand longer answers.
Can understand long, complex answers.
This answer was given within 60 minutes of the question being posted.
How do you say "Hello" in Korean? Find out on HiNative!