Vesta's Equipment is the only Ancient Warrior's set without a helmet.
The Vesta's Equipment is thought to be based on the ancient Chinese/Japanese warrior's, possibly linked the Eastern Lands.
Before the Evolution of Combat, every equipment had an attack bonus and the armours also provided a strength bonus.
Even though Vesta's equipment had a strength bonus (like the Bandos chestplate), it was removed by the Evolution of Combat. An update then allowed the Bandos chestplate to have some attack bonus, however this did not appear for Vesta's and Statius' equipment. It is unknown whether or not this was intentional.