What increase your heart rate more Pepsi or Pepsi Next?

Pepsi and Pepsi Next both contain caffeine, which can increase heart rate. However, Pepsi Next has less sugar than regular Pepsi, so the overall impact on heart rate may depend on individual sensitivity to caffeine and sugar. Generally, the difference in heart rate increase between the two would likely be minimal, but Pepsi Next may have a slightly lower impact due to its reduced sugar content. Ultimately, individual responses can vary.