similar, yet different. i dont like ritalin at all. it makes me nervous in doses that would be decent if it were dex. i used to take it when i went to school, in small amounts, and it did help me focus. but i would prefer dex anytime.
if your considering taking the amounts in the title, i think you should reconsider. you wont notice a great deal of difference from taking either amount. but with saying that, dont take too many. most people cant tell the difference between dexies and speed. i dont weigh very much at all, and if i were to take some dexies, i'd have at least 6.
hope this helped.