An amazing RTS game!
The easiest comparison can be made with C&C Generals which lacks a proper story line.
Both Dawn of War and Winter assualt have great story lines and extremely fun to play, the game play is amazing!
With the squad reienforce commands players can wage huge battles and battle stratgies rule the day. Unlinke Generals where most people race to get super weapons in this players will need to attack with infanty, heavy infanty, tanks and walkers which is an extermly nice change as you can have diffrent ways to fight with the same team.
The gameplay is aimed more at war as there isn't much resource managment (esspcially is you use the 'quick-start' option).
You will have 5 team from which you can choose and each will have their own strenghts and weakness such as the Space Marines don't mass their army like the Ork and Imperial Guard instead they use specailist squads which can turn the tide of wars.
The graphics in this game are a marvel they are amazing as you can zoom and 'alt turn' (sort of a 360 view) on any solider this is especially great with battles, and if you have the graphics on full the bodies of fallen squads will remain there until the end of the game!
If you are a fan of the RTS genre or even enjoy it every now and then, then you must buy this game as it is a Revolution in the genere.
Plus the Gold Edition (includes Dawn of War and Winter Assult) is only 29.99 at EBgames.