Grammar is especially important for the curve breakers. Here is an example of a curvebreaker made all too difficult by grammar. From PT 55 https://7sage.com/lsat_explanations/lsat-55-section-1-question-22/
The curvebreaker questions for both are difficult when the answer choice is acting like a shield for an argument that slightly strengthens or weakens. For cookie-cutter, I'd say weaken are easier. Your task is better laid out for you.