Joyetech's EGO model is the next step from their 510 model. One of the most notable benefits that the EGO boasts over the 510 is the battery life. The battery life, off a single charge, is anywhere from three to five times longer compared to a single charge off a 510 battery. The EGO's atomizer is substantially bigger than the 510's, and uses an equally larger cartridge, allowing for more liquid to be held within. If you've been looking to upgrade from your 510 kit, consider the Joyetech EGO; you will not be disappointed!