I read some reviews by fans that bought the game. They are all disappointed. Sara is blond and there are also some other characters (Haywire, Westmoreland, Pope) that look different because the producers of the game aren´t allowed to show them.
One of them said that Michael is only seen twice.

Audio production company dSonic has released a video showcasing the voice work in the upcoming Prison Break: The Conspiracy.

The company produced a number of stars from the TV show including Robert Knepper, who plays T-Bag, and stars Wentworth Miller (Michael Scofield) and Dominic Purcell (Lincoln Burrows).

"Prison Break: The Conspiracy was our first real taste of Hollywood and it was lots of the fun,” said dSonic co-founder, Simon Amarasingham.

“The celebrities were all super nice and really enjoyed getting back into their characters from the show. They were excited to see previews of the game and I remember Dominic Purcell in particular having a really huge smile on his face when he saw his character in the game for the first time."

source

I've heard mixed reviews. Some are disappointed, others loved it. So I don't know. But I think I'll buy it ayway, it
looks so awesome