^ Modafnil is pretty great, I'd recommend it, really does provide a more sustainable, functional stimulation than amphetamines. People say it's not recreational, and, yeah, it's probably not, but if you are a strong responder, as I seem to be, fortuitiously, then it feels pretty close to a recreational dopaminergic stimulant, with significant mood lift, clarity of thought and clean energy and alertness.
Armodafinil IMO is the best. More is not better though and I do constantly overshoot the sweet spot which honestly is probably half a tablet of armodafinil, very early in the morning. Also if you're not finding it effective once you figure out your sweet spot, increased doses aren't likely to help and will just make you feel more scattered and restless. Just my experience anyway. As I always remind everyone there's significant genetic variation to the effects and not everyone experiences the euphoric mood-enhancement, and some people don't even experience the wakefulness. For me though honestly it's easily comparable to dexamphetamine and methylphenidate. Only downside is the super long duration can make sleep a struggle, especially if you dose multiple days in a row.
Adrafinil I've never tried, but by all reports - it's a bit weaker, definitely more taxing on your liver, shorter lasting, just overall probably not as good. Out of all the ~afinils I've tried the 2 "originals", armodafinil and racemic modafinil are still the best. Would be interested to hear about your own adrafinil experience regardless, of course.