Читал давно, помню уже плохо, но про Шрайка там говорилось, что не было монолитного движения машин, а было несколько группировок.

И вообще там прямо и говорится, что Шрайк = Кассад.

The precise origins of the Shrike are unclear. It is known that it will be created at a point in the galaxy's distant future, although by whom, and for what purpose, remains ambiguous. Once it was suggested that it was created in the far future by the TechnoCore's Ultimate Intelligence, but at a later point Aenea says the faction of the TechnoCore known as the "Reapers" will create it in the far future. According to Aenea, after Fedmahn Kassad's fight with the Shrike in the far future, the Reapers will use the violent and soldier aspects of Fedmahn Kassad's personality and DNA, then mutate, twist, and incorporate them into forging the Shrike. Aenea also claims that the Shrike does not hold any specific allegiance or motive of its own, but is more of a pawn, designed to act as the Avatar of the TechnoCore Ultimate Intelligence, the Human Ultimate Intelligence, and the Lions and Tigers and Bears at different times and for different purposes.