While improved heat distribution reduces hair damage, a tourmaline-coated ionic generator substantially cuts drying time and seals the cuticle to lock in moisture and reduce frizz and static by 90%. One interesting bonus feature of the 4000i is that it has an ion switch, which you can leave on for smooth/straight hair or turn off if you want to add more volume.
The Infiniti 223x has tourmaline ceramic coils that prevent damage to hair because they can distribute heat more evenly. The ionic generator also helps to reduce drying time and leave hair smooth and shiny.