Meng Qi You belongs to Hou Shu kingdom (后蜀) and Liu Lian Cheng belongs to Bei Han kingdom (北汉). Based on history, Hou Shu kingdom was based in present time Chengdu and had a stable society with fewer internal wars. It was relatively rich at that time.
On the other hand Bei Han kingdom was the only kingdom in the north (Taiyuan). Because of its location, it's people lived under hardship conditions.