The surgeon takes hand off surgibot only to adjust the camera, and the controls are touch sensitive so when the surgeon takes hands off machine, instruments automatically lock in place, big safety feature.
TITXF has more hype among people because the company itself has received more media attention over the past 7+ years. Titan was hyped as Isrg killer 2009-2011 with their imminent release of AMADEUS, which never happened.
TITXF has been public since 2008, they've received a lot more exposure.
TRXC on the other hand has been a private company up until October 2013.
TRXC has been in stealth mode since its founding in 2006 and hasn't received as much "ISrG killer" hype as TITXF since TITXF has been public for a lot longer than TRXC