The LED wall is a seamless screen solution. these screens are self-lit eliminating the need to sacrifice lumens over resolution for your typical projector. Additionally, the screen can be scaled to fit any size you need, typically in increments of 12" to 24" inches.
the LED panel system is a series of LED TVs that are stitched together to create one large screen. The obvious drawback to this kind of system is the lines that are visible between the panels. While the LED panels can be a much higher resolution and a glossy screen, the seams inside the panels distract from the image you are displaying.