This quickens mental activity. Compared to Adderall, Ritalin begins to operate earlier and reaches its peak performance quickly. All of the content on Drugwatch has undergone extensive editing and quality control. Both Ritalin and Adderall are central nervous system (CNS) stimulants. Ritalin works faster to reach its peak effect, while Adderall remains in your system for a longer time.. Buy 10mg Ritalin and Adderall both successfully treat ADHD, but they operate in distinct ways.