Not as gory as the first one.
PG-13 violence type: blood and gore.
The first act of terrorism we witness takes place in Hollywood's Chinese Theatre, filled with innocent tourists who are (mostly) utterly vaporized. (We see Tony's bodyguard lying on the ground, his face severely gouged.)
But even discounting moments of uncomfortable real-world parallels, some of the scenes here are still downright disturbing. The evildoers don't make use of mere suicide bombers, but people who actually explode heating up from the inside out until they pop like kiln-heated sausages. There is very little gore, but the people in the throws of this transformation are obviously in horrible pain, and we see the heat radiate from their skin, eyeballs and mouths. We see veins and bones outlined by the literal light from within.
The body count is pretty high, what with the innocent civilians destroyed by the Mandarin's men and the scads of evildoers laid low by Tony, Rhodes and their phalanx of armor-plated suits. People are bashed and smashed and crashed. They get hit with fists and feet and bullets and jet-like weapons and flying metallic gloves and grand pianos. They're burned or superheated or submerged in water or thrown into walls or plunged into massive fires or flung from aircraft.
We see someone's mangled body hanging lifelessly from telephone wires. Another person has an arm sliced off. An attacker is choked with a pair of handcuffs before her neck burns through the metal. It's suggested that someone takes a bullet to the head live on television. We see images of war and violence on TV. A man is strung up above an immolating pool of oil.
Tony spends the majority of the movie wearing blood on his face. He painfully injects sensors into his arms. He crashes in his suit. His suit crashes into him. Pepper is manhandled, nearly strangled and, in a way, tortured.