That would depend on the context of your LitRPG. IF you use the standard context and use a type of game mmo or rpg directly you will end with a book looking exactly like the rest. Where what it matter would be again the history and how your system elements interact with it.
If you are not set in that kind of context then your system most likly would be not similar to any of those but some parts of it it will.
In my opinion and as an advice. Writting LitRPG with a 100% full system is not worth it. You will spend too much time. Focus on writing something that the mechanics and the system basics starts at 10% of the full capabilities and slowly develop it as the story progresses.