The green credentials will be more around the refrigerant used in it and it's Global Warming Potential (GWP). Lower GWP gases don't always mean lower power consumption. Reality is the energy required to keep a box at -18 hasn't really changed over the last 20 years and probably won't over the next 20.I'd expected a newer one to be more green™ and efficient™ given 20+ years of progress, but nope. Literally no change at all in electricity consumption.