In my au world of rwby their will be big differences between the show and my fanfic some will be small . 1: aura is linked to the soul there's similar but different effects that aura has some peoples aura are stiff and sturdy but others are fluid like the stiff and sturdy ones have greater defensive advantage against bladed weapons but disadvantages against blunt weapons the opposite happens with the fluid like aura blunt weapons have the disadvantage against it but bladed weapons have the advantages. 2: semblances have similarities but are still unique u can have Ruby's speed but Yang's fire so it is unique to you but for deeper info a semblance cosmetics are different for everyone so even if you have super speed it will be unique to you it can't be the same unless it is hereditary like weiss family semblance. 3: maiden power will be different it will be explained later. 4: history will change a lot and dust.