Firstly I know that the kernel is different, it's obvious. But what's the main difference? Has K26 any advantage upon K24? I found that almost all the FW support both K24 and K26. If K26 is better than K24, why don't cancel K24? It couldn't be the reason of size because the FW based on K26 is almost same as that on K24. Any one can tell me? Thanks!