If you are farming pyrelord packs it is a higher chance. Not because the mobs themselves have a higher chance to drop but because its 40 mobs on 25 man compared to 20 mobs on 10 man.
Ive been farming the scorpion packs and seems about every 2-3 groups on 25m im getting a drop and ive only gotten 1 in 10 man in the 10+ clears...that is a small sample...but im sticking to 25m
Okay, thank you very much! Been farming hell hounds on 10m for a few hours now but only 1 item have dropped, and there is not much hp difference on 25man, so I will try that.