Do the car body types matter in Rocket League? [duplicate]

According to the developer, the cars have slightly different hitboxes. Other than that, they have identical stats.

Additional Video References

• What Is The Best Car In Rocket League?
• Rocket League guide to car differences: Hitbox Comparison

Hit box can change slightly. Other than that, there is no difference whatsoever.
I'll find an official source if I can, but that's what I've noticed from personal experimentation/gameplay.

Actually, I found a ton of sources (although mostly are unofficial) by simply Googling "rocket league hitboxes". Might be worth a look-through although they just confirm what I say above.
In case you were curious about toppers: they are aesthetic only, performance isn't affected.