they are the same meaning .but express the differnt emotion . 果然。。 express ： what happen is just as expected . for example : 他果然迟到了！ ”he is late as expcted " (before he is late you think he would lae , the fact is he is late ) 真 ，just is a truth . 他 真迟到了。 he is late ,(this is a truth .) 确实：make sure about the event again. 他确实迟到了。 it meaning ,somebody make sure he is really late ( for example , the meeting is 6 ;00 pm ,but he came at 6:10.. after you check the time, then you said " 他确实迟到了，现在是6:10.） 实在 use to emphasize the result, the event ,or the mood . 他 实在太晚了。“ he is really toooo late " 他实在太好了." He is really sooo nice .”

果然 :as expected 这菜果然很好吃 As you expected that is very delicious!

果然 has two meanings. 1) it means "really" "asexpected" for example, someone told u that Tom is very very tall but u have never met him before. one day, u see someone and ur friend tells u that the guy is Tom, then u can say: 他 果然 很高。 it means he is really tall. 2) it means something follows what we expected. for example, your wife is very tired today, and u think she cant get up early next day. in fact, ur wife get up at 11 o'clock. then you can say, 我的妻子 果然 没有早起。 it means your wife didn't get up early (as u excepted).

果然，it means "that's true." for examle:果然名不虚传。 Really have a well-deserved reputation 但果然更含有事实与想象的一样，不出所料(just as expected).