I would say so. A 50 year old Aasimar would look/be, visually, less "aged" than a corresponding Human. "Age," in this case, I am using to describe the weathering and decay of the body that leads to spots, wrinkles and medical issues. If you saw an Aasimar for the first time, you'd think they were a person in their early-ish adulthood, though they are actually 70 years old. People who know of Aasimar well would probably be able to guess their actual age reliably, now that their expectations are managed.
I'd like to apologize for my previous comment being unintelligible at the start, I badly combined two sentences.