And as you can see, the Neo-Classic armor wasn't just some meager suit - in fact, it was so powerful that Tony vowed to vaporize it after he beat a villain called "Firepower", fearing it ever falling into the wrong hands:
This armor is able to utilize liquid nitrogen, to cryogenically freeze an enemy. It can also create opposing magnetic fields around said enemy, forcing the atoms of their body to repel each other - causing them to tear apart:
This armor incorporates 'safe' power systems, necessary when it became apparent that constant exposure to the powerful energy fields inside the older Iron Man armors were harming Tony's health:
Instead of a single cohesive unit, each piece of the Modular armor is a stand alone subsystem that can be interchanged at will. As such, the actual configuration at any given time will vary:
Upon studying Peter's 'Spider-Sense', Tony was able to isolate it's frequency, and create a neural-net which replicated it. This, not only gave Tony his own 'Spider-Sense', but also allowed him to negate Peter's completely:
Designed to withstand long-term exposure to at least 50 G. The wearer has blood artificially forced to body parts which would otherwise suffer from the extreme gravity:
It's also worth noting that Tony had just owned Graviton, and subdued Cap with one hand, just before getting into it with Wolverine in the above scans:
Technically, "only" implies one, so "one of the only" is grammatically correct, it would be "one of the few". But I'm just nitpicking now, great scans.
The Hydro-Armor was specifically built to function miles underwater, for deep sea missions. A special feature of this armor is that it was built with 'powers' which mimicked those of underwater creatures: