Cunfusion after buying - Toor Knives Darter T Fixed Knife

The knife looks amazing, feels amazing in the hand but after buying I was reading the description and was confused. I was originally going to order directly from Toor and it states M4 Steel. In optics planet description its states CPM S35VN a different kind of steel and then in the specs at the bottom says M4. So which one is it? Im pretty sure there is 2 different versions of the knives, one being cheaper (CPM S35VN) and one being more expensive (M4). Did i buy a marked up cheaper version on sale or the actual M4 steal. I want to know because

CPM M4 vs. S35VN is a trade-off: M4 offers superior edge retention, toughness, and cutting performance, making it a high-end tool steel, but it's not stainless and requires more care; S35VN is a balanced, easy-to-sharpen stainless steel, providing good toughness and corrosion resistance for everyday use but doesn't match M4's extreme performance. Choose M4 for demanding tasks where rust isn't an issue, and S35VN for balanced EDC (Everyday Carry) with better corrosion protection.