1.15 ohm coil:low wattagestealthy vape with low to medium vape cloud productiongood throat hitgood vapour flavourperfect for MTL vaping which is similar to the draw of traditional cigarettes, where you inhale vapour to your mouth, hold it briefly, then inhale to the lungs.0.65 ohm coil:high wattage, sub ohmdense vape cloudsintense, smooth vapour flavourperfect for DL vaping where you inhale vapour directly to the lugs by taking a deep breath in through your vape kit.