What is the different between Dimplex Opti-V vs. Dimplex Ignite models?

The DIMPLEX OPTI-V™ DUET 54" UL LISTED BUILT-IN LINEAR ELECTRIC FIREPLACE has different technology. It has ultra-realistic flickering flames with three-dimensional LED logs that sporadically spark and crackle.DIMPLEX IGNITEXL on the other has a high-resolution flame (Vivid flames that are brighter and more
lifelike day or night.)