I think it depends on the person taking them.
Energy drinks have a decent impact on my reactions, but I think the reason is bc I am very sensitive to the likes of caffeine and sugar. One sip and I won't feel the need to sleep for like 20 hours lol. The side effect tho is that at the same time that I feel they make me react faster they also hinder my focus.
I have been taking a Guarana Fruit, ginger and mate tea one lately to get through the end of this semester. Last time I tried to stay with coffee but my body really doesn't cope with that, so I'm experiencing new things.