There's definitely something special, just poorly studied: typical "how much caffeine is in X?" tables show tea having caffeine levels similar to coffee, but I never feel the same effects.

> Caffeine pills generally have really high dosages, FYI.

I use 200 mg tablets split into quarters for doses of 50–100 mg. Yet, they produce a much milder curve than coffee (which I no longer drink) and, as a side effect, cause no gastrointestinal side effects!