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I think that one of the strategies of poker is to determine how people play, usually a person will always have a model of plays or a pattern that they always follow, and that can be quickly determined by at least one machine in a casino, but for people who play actively at a game table requires a little more time, when it comes to playing physically it is easier because of their gestures, but when it is in a digital game way it is more difficult, I think the most easy to see is when bets are made and some check and some don't, I think that's a way that you can take into account to determine if you can get a person's style of play, but of course it's not entirely reliable .
I don`t think that playing in the internet easier than playing in offline casino. This is just different types of game. In online poker you don`t see the opponent, but the opponent doesn`t see you. That`s why you can concentrate on the game. And you don`t need to read the opponent, you spend all your time at cards. I think that it can be a problem to become offline player if you played only online before.