There are many diffrences one they are in two completely diffrent decades. The Outsiders takes place in the mid 60's and The Perks of Being a Wallflower takes place in the late 90's. Second Charlie has PTSD and anxity and in the Outsiders Ponyboy does not have any disorders or it doesn't talk about any. Lastly the plot of The Outsiders took place in many diffrent places like Tulsa Oklahoma, and abandoned church, a park, the movie theater. Perks of being a Wallflower takes place mostlu at school and at his house or Sam's
If you liked The Outsiders then try The Perks of Being a Wallflower because they are alike in many ways and also really different. They both also have different themes but in the end they both overcome their goals.