What makes TeaCrine's energy different from caffeine's?
Well, both modulate adenosine, which is what signals fatigue.
But, caffeine hits adenosine head-on. Adenosine can no longer fire the fatigue signal.
TeaCrine, on the other hand, "unlocks" adenosine through the side door. It isn't as aggressive as caffeine's signal, so adenosine can still fire - just to a lesser degree.
Because of this, feelings of fatigue are reduced when you take TeaCrine. And even after 60 days of taking it, your body hasn't produced more adenosine. Your body has not habituated.
With caffeine, the feelings of fatigue are blocked for a time, making you feel more awake. After 4-5 days of caffeine, your body makes more adenosine. Translation: you're becoming dependent on caffeine.