Malaysia trigo show panda and others by Private mint New Shanghai century mint. Same mint uses 3 different technics and technologies in making those medals. Reasons cost factors and limitations. China official mint non fiat coins also face same issue but they need to comply certain policy set by their ultimate parent company and their grand grand parent who is china government lmao. They can not to use their best and latest technologies and Technics for all items minted by them and it can vary highly due to requirements, costs, accessibility and relationship to them. Buy what you like and within your financial ability . No impulsive and affect by medias in decision making.