There is no official statement on armor sets in this game but check the
Speculation Armor page for conjecture gleaned from screenshots and vids.
Weight of armor is not going to affect how fast character roll.
"Armor blessed by the god of war Faraam." "This armor is designed in the style of the Lion Knights, an order of once powerful Forossa. Although Lion Knights wore heavy armor, they were feared for their agility with the sword in both hands."
"Armor worn by the Knights of the Silver Dragon Lindelt" "Though little is actually known about the order, it is said their well established miracles and steadfast facing of death made those loyal to Lindeldt a worthy rival."
"Metal Armor worn by Knights Despite the use of a fine metal, the grooved textures gives extra protection. Many knights prefer the helmet for its fine craftsmanship, and its kind was passed through the generations."
"Tunic worn by the great wizard Straid. Straid was a sworn brother in arms of the former king of old, Olaphis. Together they killed the Old Dragon and have tasted omniscience. However, even the wisdom of the renowned Olaphis was not sufficient to control the outcome of his singular magic arts."
"Reinforced with a rare steel armor. Excellent defensive equipment that is both lightweight and sturdy. Designed by the master blacksmith Llewellyn. Easily identifiable by the absence of all ostentation, focusing exclusively on simplicity and power."
"Worn by the Magi who wander in search of souls. Black clothes like these are brands of the wizard palace. Maybe in life, the wearer was an old cunning creature of the court who used his art to resist foreign threats."
"Drangleic traditional armor. Granted only to knights whose loyalty has been recognized by the king. Vendrick was a righteous king. His knights have demonstrated both courage and charity, and helped lead his country to prosperity. This equipment is a proof of his great exploits. "