The numbers published by the pro-Sunni organization show the real story.
Only 22000 Sunni troops have been killed compared to 45000 Assad troops, a veritable massacre. If these numbers were all the truth, Assad would have lost long ago.
Also the civilian deaths make no sense, 4000 woman and 6000 children, leaves almost 30000 others.
If we assume the same number of men as women are dead innocent civilians, that leaves 26000 fighting age Sunni to add to the official 22000 Sunni soldiers.
Such a low number of civilian deaths implies that both sides are intent on killing combatants and that civilians have time to flee.
Then 45000 dead Assad troops compared to 48000 dead Sunni makes sense.