MotorTrend was never SpeedVision, it's the former Discovery HD Theater and Velocity. WBD sold the magazine to Hearst about a year ago, so they rebranded it to what they have already been using for their international automotive focused spinoff channels.
FS1 is the former SpeedVision. One of the founders of SpeedVision repurchased the brand and relaunched it as a FAST channel that's available on channel 4194