My dad can tell the difference between a '38 and a '39 Ford, a '68 & '69 Camaro, and a boatload of other vehicles. I know the tailgates are different between '70 & '71 and 2000 & 2001 Dodge pickups just because I've owned one or the other. But are there any exterior differences in the 4th Gen model years? It's tough enough with the different headlights and grills that came out in the same year, and the '02 HD's look like my 2001, and the 2019 Classics look like my 2018. Shoot, I couldn't even tell if I was behind a Ram or Chevy coming back from lunch an hour ago because it didn't have a tailgate or tow mirrors. If you can't tell, it doesn't take much to confuse me.