Imo the spear is much closer to a RL partisan, however lacking any protrusion for parrying.
While the glaive
V2 glaive is short. I’d guess around 1.20m, not much longer than Bardin’s 2h-axe. Kerillian also holds and swings the glaive in a fashion not too much different.
The spear is handled in a way more similar to the halberd (or the opposite). Both have clearly much longer shafts, at least 1.5m.