This article is a work in progress; It is currently not approved as canon.
The Winter II is designed to be tailored to different classifications. As such, variations exist of the stock model.
The most conventional type, manned variants are typically the stock model. They feature a full sarcophagus style cockpit and are designed to accommodate a pilot inside the frame.
Sealing the pilot in, the sarcophagus-type features a saddle inside the frame and two arm-alcoves which are movable, forming the mandable arms of the frame, as well as the head of the frame which wraps over the pilot as a large densely armored helmet. This particular type is smaller and well suited to roles which involve high speed combat.
Featuring a more traditional cockpit with the pilot upon a seat and doing away with the arm alcoves and helmet this version is generally more rugged but is much heavier, poorly balanced, limits the frame's mobility, is a cramped space (instead of fitting over the pilot as power-armor does) and really intended only as a trainer.
Essentially any type which features no pilot. This can include cockpit models which are empty or carrying a passenger or specialist models which feature no cockpit interior.
Variants which swap out the stock parts, often for simpled versions of common components.
Often they feature simplified parts and are cheaper to produce, but are inferior to manned types, warhead types replace the cockpit with a torpedo warhead or bomb, with the intended purpose being not to deliver the round and return but to be used as suicidal drones able to defend themselves on the way to a target. As such, their powerplants and major tend to be of inferior quality, given they only need to run a single sortie.
Rarely deployed, these four-legged types feature a truss beneath the hip mounting two legs, making four in total. Typically, they are consigned to groups on longer deployments - either as pack-horses carrying additional fuel and ordnance both internally and externally or they bring special equipment such as a cannon or special weapon other types are unable to lift or move. They often feature additional external armor.
These types replace entire arms with simplified mounted weapons, turning the main shoulders into turrets. This often allows for a radically simpler, cheaper design and the use of specialist weapons. Unlike other specialist types, both manned and unmanned types may feature arm-weapons - manned-types often featuring a large rifle in the mandable arms.
Similar to arm-weapons, leg-boosters simplify the leg with a form resembling a wing of sorts with a knee joint. Like arm-weapons, they are simpler and cheaper to deploy and feature radically simplified feet that are only really capable of standing or ground-skimming, not walking. Often, they are used on cheaper drones, especially those used in deep space.
Replacing the sarcophagus cockpit, the torso is hollowed out and simplified: a back-mounted prehensile umbilical arm connecting a common power-armor into the torso cavity. This power-armor is able to freely disembark or move. Often, these models feature a simplified fighter-like transformation.