At least when the servers merged we noticed a huge difference in siege tactics and general open world tactics. Without putting jordine down too much we noticed jordine was quite lacking. Maybe because of harmony and grind and the influence they had. Even enemy when we came to this merged server was pretty basic. Strong players ofc but basic in terms of any tactics. In fact I'm not even sure they had a defence team or cannon squad lol. So guild tactics vary hugely and I really believe it makes more impact than people think. People like to blame gear and in 5v5 I can appreciate the impact of gear but a siege is a different animal. Ofc gear does help but like u say the longer we go the closer that gear gap gets among the top guilds.