First, reviewed here Peak capsules contain slightly less content per capsule. The 120 capsules weigh 108 grams, the 80 Kick Speed Capsules come together to 91 grams (0.9 g / capsule to 1.14g / capsule). The capsule housing makes at first glance no matter, since in itself the cases have identical dimensions.
The ingredients, however differ very much from each other. The Kick Speed Capsules contain not only caffeine and guarana a whole range of different substances. The peak capsules contain primarily caffeine and next only other ingredients that have virtually no effects (?) (Maltodextrin, collagenous protein (capsule), Magnesium stearate). I personally do not think so much of a Zerealienmix how he is to be found in the Kick Speed Capsules. However, this is more a question of taste than anything else (Adverse effects thereby me z. B. would not be known).
The envelopes of the peak-capsules are made of a different material than the sheaths of the kick-speed capsules. This could lead to faster or slower release of the ingredients. It is difficult to measure this by the subjective experience. Differences in this regard are not felt at least for me.
The peak-caps seem to me of their effect slightly stronger, but this is very very subjective and can not be objectively established - at least not for me as a layman without the aid of medical instruments.
Both products I can recommend especially for sports. I take the capsules in front running and have both products each have a significantly greater endurance against a run without capsule. In everyday life, or for flexible reminders such capsules are not really suitable. This I was tested with the kick-speed capsules for extended periods. Unfortunately, you get used to very quickly on the caffeine level. Even the stimulant effect is not so convincing (at least for regular use) outside the sport. Taking the capsules only over longer distances occasionally one, they are very suitable for night through. My first kick-speed capsule I took z. B. a, after having previously undergone one night because I had just a lot of stress at the time. After ingestion of a single capsule I was about 8 hours very, very alert and fit, both mentally and physically.