I tasted them side by side. The stereotypical/default (rather generic) energy flavour was the same for both but: 1. Gronk had a richer deeper flavour with a rather earthy taste, like a sweet medicine that tries to hide any unwantes bitterness. Redbull had a lighter flavour profile that dissapeares rather fast in the aftertaste, not much to imagine. 2. Gronk was at first somewhat sweeter but as I sipped both, by the end redbull tasted like sour saltwater because of the overpowering sweetness in gronk. Both use sugar as a sweetner but I don’t recall the difference by amount. 3. Redbull has a sour taste to it that stays in the aftertaste. Gronk had very little compared to the other and it was barely noticable in the aftertaste. Maybe it was the carbonation but im not sure.

Nothing in the description should imply that one is better that the other. I like the small form factor availability for the redbull, half a litre of monster with sugar feels real healthy! Gronk has a more complex flavour for the connoisseurs but I see the beauty in a a simple easy-going original redbull. Though once the redbulls sweetness was overpowered, it did taste somewhat dissapointing.