> 技術上不知道有無互相關聯
就你引用的這篇文，裡面的人(也就是我上面提到的那位AMD) 有說
However Robert Hallock, AMD’s head of global technical marketing at AMD made it clear that Vulkan only represents one of multiple outcomes of the API’s evolution.
We will get to explore and discover all the other future avenues that AMD has planned for Mantle tomorrow, as they’re announced during the company’s next keynote at GDC.
Vulkan 只重現mantle的部份改革，mantle還有一些新的東西明天會出來

從這邊可以確認 至少不是繼承的關係
合作嘛 就上面我提到那部份 AMD 說 Khronos 有拿走一些mantle的亮點用在vulkan上面

至於vulkan 跟mantle 之間有詞彙上的關係，我倒是完全沒想到
只覺的vulkan 這名字很怪