Both groups have threefold centres and mirror lines, and telling them apart is the classic trap of the subject. Exercise 23 of 29, checked as you type.
Molecular point groups with their operations and character tables, the 230 space groups with a cell builder, and the 17 wallpaper and 7 frieze groups drawn live. The tool needs JavaScript, and WebGL2 for the 3D views; these are the pages it offers: