Regular 510 attys work on the eGO, vGO, T-rex, etc. They're all pretty much the same, a battery enclosed in a fancy case. The LR or Low Resistance atty, as the name implies, performs at a lower resistance than normal attys and therefore gets hotter FAST. It simulates vaping a higher voltages while being used in standard 3.7 volt vaping devices. If you have never experienced it, I'd say get one, but be ready for the INSTANT burn, it gets red hot in a nanosecond. You must prime it with 8-10 drops of liquid, get ready to burn it off fast and then re-prime with 3-4 more drops before you start vaping. During vaping, it's going to burn through the liquid much faster and you will have to re-drip more. It's not for everyone, but it's something you should experience if not for opinions sake. Some like it, some don't. I'm on the fence. You are better off with thicker e-juice when running LR attys. The other alternative is to go ahead and get a 5 or 6 volt vaping device. Also, LR attys being basically tweaked out or overclocked for the computer nerds among us, do not hold the same warranty (if at all) as regular attys and also are reported to not have nearly the same lifespan as they do run very hot and most people do not properly maintain them. Even if properly maintained, they are not supposed to last as long. Lastly, eGo's are great, I like the t-rex because of the l.e.d. ring, but either way, they're awesome. Just remember, when they die, they die. This is because unlike other mods, the battery is enclosed and not user serviceable. They're just bigger and fancier, will last longer (much) than your standard 510 battery and just look damn cool. Hope that helps a bit.
edit: I'm finding that non joye attys suck. They suck really fast, and really bad. I'm also finding that real joye 510 attys rock. They rock hard and they rock alot. Yup. Sho nuff.