The spear/sword cavalry distinction in a21 is backwards compared to history. Cavalry spears and lances were very powerful against armored targets because they have the weight of the horse and rider behind a focused point. In contrast, swords were effective against unarmored targets; you can easily slice through flesh with a sword, doing a huge amount of damage, but a cut from a sword does not penetrate armor well. If one cavalry type should have a role of harassing peasants and unarmored targets, it should be the sword cavalry, and the spear cavalry should be more powerful in armored confrontations.