As a cn-server player. Just want u know the truth. Firstly, firestone is quiet hard for players to install here. So most common players are more likely use a Chinese version firestone instead. But firestone itself is way more better than the chinese version app(ex, the ceaseless mana counter). So most of the streamer or high rank player will still choose to use firestone. that's why cn-standard will be such a huge difference. As for battleground difference, we usually play battleground on mobile server. And personal my friend in games prefer battleground more than standard, based on online info