The definition from this source is "Two classes of spacecraft bring together the advantages of having momentum bias and yet provide a non-spinning base for accommodation of payload elements and torquers. These are the dual-spin spacecraft and the hybrid spacecraft. In each case momentum bias is provided by mounting a rotating body—or more than one—on the non-spinning part; it is part of the structure in the case of the dual-spin spacecraft, but consists of high-speed purpose-built wheels—momentum wheels—in the case of the hybrid spacecraft."
My interpretation for this is that for dual-spin spacecraft, its momentum basis is from a large slow rotating structure while for hybrid spacecraft, it is from a high speed momentum wheels? How does these 2 differ from pure spinner spacecraft? What is the distinguishing feature that define each of them?