Iron Man helmets distinctions are plain as the nose on your face in Tony Stark's Drive for tech as well as always updating his designs. This is precisely why there are so very many variations of the armored suits, which he refers to as Mark One, II, III, etcetera.
Whether or not we're having a debate about the films or comic variety, Stark is a problem solver. Witness his dedication in the third film to preparing for any and every situation with the Heavy Lifting suit, which holds a structure up at the end of the movie. There is a similarity in the comics world likewise, where Tony Stark aims to wrangle control over several of the mightiest super heros in the Marvel Universe, such as The Hulk and The Mighty Thor.
Clearly, anything can be undertaken in comic book form, because all that's needed is a credible story plus a competent art team. This detail was the beginning of the Iron Man suit which can be summoned immediately, even from a distance. This is a rare case of a quite complex idea from the comics working quite nicely in the film, along using the case of the Mark Five suitcase suit, that we'll talk about below.
You could argue that it's roughly as easy to tell stories in a movie just as in a comic book, since the technology is there today to take the notion of the Iron Man helmet, armor and even armaments contained in a briefcase and reimagine the concept as a transformer of sorts and simply transform into the Mark Five armor itself.
I find it really spectacular if you consider how much amount of computing power which allows movie goers to see the Iron Man helmets secure in place as with the Mark 5 armor in the second Iron Man film. Computer animation specialists, engineers plus concept artists all collaborate to create a true comic fan's fantasy to the silver screen.
The main style of the 1st suit follows the same motif in the comic books as in the motion pictures. Hurriedly constructed "from scraps", to cite Jeff Bridge's Obadiah Stane in the 1st film, this Iron Man helmet is intended to be unattractive but functional. Its primary reason for being is basically to shelter Stark's skull and prevent him from getting shot in the head at the time of his escape from imprisonment.
Later motifs sustain a matching pattern, predominantly in the film variations of Tony Stark's armor progression. A pair of lit eye slits are the main characteristic and, to a lesser degree, a mouth opening in addition to a red and gold color scheme.
The helmet occasionally does not add a mouth section, like in the comic and motion picture variants of the Suborbital armor created for space travel.
The red/gold color scheme is fascinating to countless Iron Man fans. The comic book story explains that Tony opted for these shades of color based on his primary school hues. The film explanation is more practical with the Iron Man helmet, suit and basic design being a proper example of usability. Because the Mark II comes close to crashing in the 1st movie thanks to the accumulation of frost, Stark utilizes a golden alloy that will prevent the accumulation on the Mark III.
As Stark waits for the armor to be built in his basement production line, he instructs JARVIS to "throw a little hot rod red in there", referring to his Mark Three design.
You will find more nuances than a brief piece of writing like this can talk about, however Iron Man helmet and armor versions often are comprised of form following function.