# Are these two methods of differential cryptanalysis different?

I'm trying to understand how differential analysis works. I'm reading this and this tutorials, but it looks like they do different things. In the first paper author tells us to bruteforce last round using every possible keybits for active sboxes and traces differential up to r-1 round. In second work differential goes to the end and bruteforce goes only for a number of keys and author finds k0 and k1 at the same time. Which method is a basic to find round keys?

• What do you mean with "a basic"? A textbook approach for differential cryptanalysis ? Sep 17 '20 at 18:12

bruteforce last round using every possible keybit [at the output of] active sboxes and trace differentials up to [the output of] $$r-1$$ rounds
In fact the other (amazing king) reference is essentially using the same approach (whether the author of the webpage realizes it) since that is a one round cipher with $$r=1,$$ so $$r-1=0,$$ and the $$r-1$$ differential is the input (plaintext) difference.