Simplify the following text for a Grade 11 native English-speaking person.
Original: Although the Atari 5200 's internal design was extensively based on that of the 400\/800 home computers , the differences were sufficient that games designed for one would not run directly on the other .
Simplified: Although the Atari 5200 's insides were very much like that of the 400\/800 home computers , the differences were enough so that games designed for one would not run directly on the other .