Monster vs. Rockstar

Monster wins clearly: an average Shark Score of 75 to 58 across the 35 and 11 drinks we've rated. The best Monster we've had is Monster Ultra Gold (91); the best Rockstar is Rockstar Juiced Island-Mango (91). Rockstar hits harder: a typical can has 240 mg of caffeine to 160 mg.

Rockstar does, on average: a median of 240 mg per can to 160 mg for Monster. The strongest Monster we've rated is Java Monster Cold Brew Sweet Black (200 mg in 16 fl oz); the strongest Rockstar is Rockstar XDurance Super Sour Green Apple (300 mg in 16 fl oz). Can sizes differ, so compare caffeine per fluid ounce too: 9.6 mg vs. 15 mg (median).

By Shark Score, the best Monster is Monster Ultra Gold (91) and the best Rockstar is Rockstar Juiced Island-Mango (91). See every Monster drink ranked and every Rockstar drink ranked.

Of the drinks we've rated, 11 of 35 Monster drinks and 1 of 11 Rockstar drinks are zero sugar. Formulas change, so check the can.

Monster Energy Drink scores 70 and Rockstar Original scores 40, so the original Monster wins. Caffeine: 160 mg in 16 fl oz vs. 160 mg in 16 fl oz.