That's the difference between your asshole and butthole !

They follow different rules. Educational Rounds are after ACM-ICPC rules, while Codeforces Rounds use Codeforces rules. Also, Codeforces Rounds has a discriminative speciality of different divs.

To give you a gist -

• Educational rounds are meant for learning and not exactly practising (normal CF rounds).

• There is a 12 hr hacking phase once the contest gets over in case of Educational rounds. Hence, for rating update u must wait for 12-13 hrs :(

• Standings in Educational rounds are based on no of problems solved and penalties, whereas, in normal CF rounds, its based on total points earned (points for each question decrease with every passing minute)

PS- I personally find Educational rounds a bit tougher. They often involve some well known trick/technique ,which I often don't know :(