Reading the core book after the beginner box I realized that there are some changes to the rules between them (the most obvious is all the changes to critical strikes and weapon lethality, but also how much  you need to spend in order to help somebody doing the same action than you, or that the Recover action only recovers 1 Fatigue or Strife always instead of 1 of them if you have more than half).

I was thinking in using the rules booklet in the beginner box as a game aid in the table to help consult core rules easily, but in order to do that I'd have to find and correct all the rules that have changed. Do you have a list of the changes between the two products, or somebody tried to do something similar?

Thanks!

I would advise to go with the core book, but suit yourself.