What are the similarities and differences between the modern Olympic Games and the ancients?

Modern sports games:

1) They pass every 4 years;

2) The Olympiad is held within 16 days;

3) Different countries take part in the competition;

4) Also, both men and women can take part in the competition, that is, there is no gender discrimination.

5) There is a certain set of sports disciplines.

Ancient sports games:

1) They pass every 4 years;

2) The Olympiad lasts 5 days;

3) Only Greeks can take part in the competition;

4) There is gender discrimination, since only men are allowed;

5) There are 5 main sports disciplines.