Vince Vaughn -- Good Genes or Good Docs?

Vince Vaughn looks so money!

Here’s a 26-year-old version of the actor at the premiere of his breakout movie "Swingers" in 1996 (left) and 20 years later ... the comedic genius – who celebrated his 46th birthday earlier this week – at a party last month (right).

Aging like a champion!

The question is …