It really does make a huge difference. My friend's parents are the same age and are relatively young, in their early 50s. His mom smokes, and looks even worse than the left image, while his dad isn't even in great shape but easily looks 10 years younger than her at a minimum.

I also know someone who stopped smoking and after a year or two she looked significantly younger, it was kind of crazy. Didn't even really make any other significant lifestyle changes tbh.