I'm assuming that by "energy boost" you mean caffeine? The calories in all sports drinks boost your energy ...
Gu Roctane energy drink has caffeine, but I've never tried it so I can't comment. I do use caffeinated Gu Roctane gels before/during an endurance foot race - my favorite flavor is Island Nectar. I don't typically supplement caffeine during a ride.
It's all very personal what your digestive system can tolerate. I usually use HEED just because it's so widely available, though it doesn't have enough electrolytes for me personally, so I wind up drinking a lot of Nuun U Naturals and/or taking Endurolytes or Salt Stick capsules and/or being very liberal with the salt shaker at meals (my last resort, because I really don't like the taste of salty food and I can never get enough sodium that way). My preferred flavor of HEED is lemon/lime and my preferred flavor of Nuun U Naturals is tangerine/ginger.