Alright, this thread needs to stay on topic and avoid being some 'what do you like better: Amphetamine v Methylphenidate' type bullshit.
Adderall/mixed amphetamine salts and Concerta (extended release MPH) are two very different drugs prescribed for the same diagnosis. From what I hear, MPH sounds pretty inferior to Adderall, Dexadrine, Vyvanse of Desoxyn (any of the amphetamine medications). MPH is not an amphetamine but rather a Dopamine Reuptake Inhihitor, much like cocaine and MDPV (just weaker and shittier).