What are the differences between Mark 3 to 7?

[Wildcardz]

In the Iron Man movies... are there any differences between the helmets?
If so, what are they and does anyone have a link to show those?

 

[Spardax]

The helmet of mark 2/3/4/6 are equal
The helmet of mark 7 is different from mark 3 only in the chin.

Mark 7 helmet


Mark 3 helmet


This is Mark 3


This is Mark 7


The differences between the two armors are evident

 

[Biskt]

Spardax, the mark 7 helmet also lacks blots/screws in the helmet, and the fork above the brow of the faceplate is smaller, and more curved around the air intake.

 

[omarbou1]

And the Face plate is smaller also there are few differences in the overall shape
And there are differences between mark 4/6 and 3
The physical mark3 helmet doesnt have the theeth details and there are slight differences
In the vent

 

[Spardax]

Spardax, the mark 7 helmet also lacks blots/screws in the helmet, and the fork above the brow of the faceplate is smaller, and more curved around the air intake.

And the Face plate is smaller also there are few differences in the overall shape
And there are differences between mark 4/6 and 3
The physical mark3 helmet doesnt have the theeth details and there are slight differences
In the vent

All right! I forgot the differences in the theeth, but there are screws in the helmet. This image is more detailed