This seems to be the best option for chasing down that helmet for October 2020.
The Esperia Glaive, sometimes called the Vanduul Glaive, is an old game design which hasn’t seen much in the way of modernization. When compared to the Gladius for the helmet challenge the big difference is the Glaive has massive alpha strike damage and higher sustained gun DPS while the Gladius can carry more potential damage in missiles. Outside of that the two ships are roughly the same as far as stats go.
Some players are reporting issues with the Glaive’s cockpit randomly popping open while flying.
The switch to the Rattler II missiles gives the user some serious ability to drop shields quickly. The cluster capability of the Rattler II is unmatched by other missile types. Fire your Rattler II’s while close in to reduce the target’s ability to use countermeasures.