Are they better than a single din?

The simple answer to your second question is that, no, you dont everneeda double DIN head unit.

What Does 2 DIN Car Stereo Mean?

People in cars looking at a single DIN and double DIN radio

Lifewire / Adrian Mangel

TheInternational Standards Organizationadopted DIN 75490 as ISO 7736, which is used by automakers all around the world.

Of course, depth is also important, and neither ISO 7736 or DIN 75490 specify a depth.

That means some cars with especially shallow head unit receptacles can have trouble fitting certain head units.

That’s why it’s still a good idea to consult a fit guide before you make a purchase.

If your radio measures roughly 7 inches long by 4 inches tall, then its double DIN.

There is also a1.5 DINsize that falls in between, but it is rarely used.

These head units, as the name implies, measure about 3 inches tall.

Is 2 DIN Better Than 1 DIN?

Double DIN head units arent necessarily better than single DIN head units.