Is canadarm2 and dextre the same thing?

No, Canadarm2 and Dextre are not the same. Canadarm2 is a robotic arm used on the International Space Station to move equipment and help with spacewalks, while Dextre (also known as the Special Purpose Dexterous Manipulator) is a robotic "hand" that can perform delicate tasks and repairs on the station. They work together as part of the larger robotic system on the ISS.