If you haven't played RE9 yet, you should
We all know that there is quite a bit of overlap between the two franchises, for a number of reasons. But seeing how we have no hope (at the moment) of the third instalment, you absolutely should play RE Requiem.
I won't list all the similarities, as to not spoil the game for those who have not yet played, but this is the first game in the RE franchise that hit all the notes for me, a player that considers EW games to be the pinnacle of survival horror. So many times I've gone through a part of the game and said to myself : "Wait, I already did this before...in Evil Within!" The only thing missing for me was the BAE Nurse.