I drink a can now and then if I don't have time to go get coffee, which tastes better IMO and has FAR less sugar.
Snopes has a page with lots of good info on Red Bull, even if the main topic they begin by debunking is kind of silly. I was surprised to find out that multiple countries have banned it due to what they perceive as high caffeine content (including France!).
A little googling also revealed that Bawls contains 66.7mg of caffeine per 10oz bottle, while Red Bull has 80mg per 8oz can. Container might be larger but the contents are different. Couldn't find info for the other drinks mentioned (Rockstar etc.) but I didn't look terribly hard. Red Bull was easy to find because they have 50% of the market and Bawls is all over the internet because of their demographic.
A last note on RB - if you're vegetarian (or even vegan) it's an ok source of B vitamins if you can't be bothered to get tablets or whatever. RB is vegan friendly (another surprise from Snopes).