No noticeable hue/intensity difference between the rolls of LEDs. Comes with leads soldered onto the start and finish & 3M tape on the back - easy to use stuff and surprisingly durable all around. The strips themselves put out an enormous amount of light for their size. I was skeptical at first while running them around a bookshelf but once I put them along the top of the wall, the whole room lit up. The app makes it easy to change the colors, turn them on and off, and automate with Alexa, Google Home, or Siri/Homekit.