I got a variety pack of blades from Amazon - samples of something like 15 different configurations. There's definitely a difference, but I don't remember what they were since I shave 1-2 times a week and am fully bearded, so 1 blade lasts a long time. I wish I could offer more advice, maybe get a set like this: https://smile.amazon.com/gp/product/B00XLMZ0LI/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 and get a feel for what works for you.