One of the many things that makes Saints Row (Well SR2 atleast) better than GTA is the Traffic.
In GTA (GTA V specially) you will find many cars of the same type over and over again.
i.g: you will see 6 cars driving behind each other and all of them are Cavalcades, The only difference is the color.
I remember in a mission in GTA TBOGT where Yusuf Amir lands a helicopter in Star Junction, All the cars that crash where Feltzers.
The traffic becomes boring cause everyone in the GTA World owns the same car.
But in Saints Row, You hardly ever see the same car over and over in Traffic. And if you spot the same car you will notice some differences. Yes, the color but also the wheels. The wheels are always different. Yes there are default wheels for each car but in Traffic they are always different. Also there are Beater variants for almost every car in game. Hell, the luxury Justice has a beater variant parked somewhere.
Just today, in Saints Row 2, i was escaping from the cops and i stole a fully tuned out Pheonix that was stuck in a Traffic Jam. Fully Tuned! In Traffic! Last time i saw tuned cars in GTA was during races or missions, never in free roam. Thankfully there are slightly tuned Gang Cars in GTA V...but still. Those only spawn in the Ghetto.
I Hope Rockstar Games adds this kind of variety in the next Grand Theft Auto.
Not only does it make the world more alive and realistic but it also adds fun to the game.
TL;DR: In GTA all traffic cars are mostly the same. In Saints Row, Traffic cars are different as some have Spoilers, Body kits, Different Wheels or are having sick paints jobs on em.
Do you agree with me?