The plus has quite a list of good extras on top of the premium as follows :
Premium Plus Pack provides 20-inch alloy wheels, Lexus Link Pro 14-inch multimedia with navigation, leather upholstery, heated and ventilated front seats, heated rear seats, four-eye LED headlights with Adaptive High-beam System, a Panoramic View Monitor and ambient cabin lighting with 64 selectable colours.
Plus head up display.