They handle heat differently. ghd Sculpt's Heat-Adapt technology uses AI to change the temperature while you style, and ghd Chronos maintains 185°C with HD motion-responsive™ technology. Plate widths are close: 26.7mm on ghd Sculpt and 26.8mm on ghd Chronos. ghd Sculpt comes with a 2-year warranty and ghd Chronos with a 3-year warranty. Compare all ghd straighteners.