A stuck pixel is "stuck" showing a color while dead means dead, it doesn't work. A pixel could be stuck on black and look dead but stuck means it could be fixed and dead can't come back to life. There is no way to tell but usually it's not stuck on black. Also a whole pixel might not be dead or stuck, like the red and blue subpixels still work fine but just the green is dead or stuck. We refer to this as a half dead or half stuck pixel. There are other people who don't use the half terms and refer to stuck is half and dead is full.