There's no other way to put it: The Subject Pulse looks alarmingly like the DJ Slims. Both pairs feature a wide black plastic headband and near-identical controls—the only obvious differences are in ear pad size and paint job. Even the metallic headband adjusters look the same, and when you remove the ear pads the enclosures and grilles housing the drivers look identical (same size and number of holes, same swivel-type mount to the headband). There are some other subtle differentiators, like the use of different headband material textures (rubberized on the DJ Slims, glossy on the Pulse) and a raised, stylized button surface on the DJ Slims—see the picture below for a side-by-side comparison.
The Power button and controls are located on the right earpiece, and a dummy set of controls (that look like buttons but aren't) covers the left earpiece's outer panel, presumably for aesthetic symmetry. Yup, same setup on the DJ Slims. The blinking blue status LED is sized and placed identically on both pairs—something, by the way, that's not optimal. The light could be smaller, and placed somewhere so that those around you don't have to see it flashing constantly while you wear them.