 The Master System version that was sold in Europe and Latin America is quite  different to the Game Gear versions. The Introduction and Gigalopolis Zone  have completely different music, while most music in the stages have  different arrangements (except Mecha Green Hill Zone and Electric Egg Zone).  The Player Select uses the character sprites instead of a portrait of Sonic  or Tails and the title screen just has a blue background. There is more range  of view in the levels, like Sonic the Hedgehog 2 (1992/II) which makes the  game slightly easier. Also at the end of level tally it says Continue instead  of Conti.