Just beat the game and saw the final boss....had a hard time convincing my 15 or so summons to attack it and had to solo half of it with a spearton...then I pushed defend and they attacked it :D
Anyways, I didn't really like the speartons that much, only upgraded their weapon with spare points, I liked to use the swordwraths because they're cheap...and they do the same damage as a fully upgraded spearton...and easier to mass for say giants.
Also...maxed attack spearton/swordwrath = 1hit enemy swordwraths/etc when you control them...
Also it seems speartons are more controllable, because they only have 1 quick attack (at least with spear) while swordwraths have...4? attacks, 1 of which is REALLY slow, and leaves you vunerable for a second or two...interestingly, they don't all do the damage at the time where the sword/foot "impacts" the target, in a lot of lag I've seen the side-swipe of the sword kill at about midway through the animation/swing.
...would you rather have like 4 swordwraths fighting a giant or a single spearton? Which would take it down faster?