There are two main types of Sear Cage/Safety Levers for the CZ 75 variant safety models. The Spindle Style and the D Style. This is because different CZ safety models use different safety lever interface designs. For clarity, when i say safety interface, i am talking about how the left and right side safety levers lock together and work as one part.
The CZ SP-01, SP-01 Shadow and variants use a D style safety lever interface and a D style Sear Cage.
The CZ 75 SA, 75 Stainless, CZ 85 B and 85 Combat use a Spindle style safety interface and a Spindle style sear cage.
Though you can use ether style in any of the listed models, the safety interface style must match the Sear Cage.
There are a few more safety lever options for the D style sear cage, this is why some folks choose to change out the sear cage to a D style so that they can make use of the added options.