It's the same one, because there is no unit of ten thousand in the United States, and the largest one is thousand, while the first letter of thousand in English is K, so there are two translations.

However, due to translation problems, China occasionally referred to "the hammer of war" as "the hammer of war in the Middle Ages", which led to confusion. In fact, in the most popular countries in Europe and America, the word "Warhammer" refers to "Warhammer 40,000" in more scenes than "Warhammer Fantasy".

Because today's Warhammer 40,000 is far more popular and well-known than the medieval Warhammer, according to the financial report of Game Workshop Company in recent years, the number of players with Warhammer 40,000 in the world is about 5~6 times that of the medieval Warhammer. The reason why Warhammer 40,000 is more popular than medieval Warhammer may be that the former is easier to get started than the latter, and the entry threshold for new players is lower.