Looks like Cossacks 2 will have fatigue as a factor, IG only morale. IG will have naval battles and Cossacks 2 wont. IG wont have horse arty, Cossacks will. Cossacks will also have larger battles, more units on the field. So far the only con against Cossacks that Ive seen is no naval batles. Still looks better so far IMO.