zPower on trainers like the Kurt Kinetic Road Machine or CycleOps Fluid 2 take acceleration into account. Additionally, these fluid trainers behave differently from the Mag Blue Twist you were using previously.
It’ll be a combination of turning on 3-second smoothing in your Settings menu and adjusting how you ride. Additionally, make sure your speed sensor is properly aligned and that the ANT+ adapter is close to your sensors (though I am assuming both of these are already like this).