Difference in perception of Islam between/among people who have studied abroad and those who haven't
次のように言うのはどうでしょうか?
ーDifference in Perception of Islam between/among People who Have Studied Abroad and Those who Haven't
「留学経験者と未経験車のイスラム教に対する認識の違い」
difference in perception で「認識の違い」
Islam で「イスラム教」
people who have studied abroad and those who haven't で「留学したことがある人としたことがない人」=「留学経験者と未経験者」
ご参考まで!