Both Acrylic and HD Metal print will provide a very similar high reflection glass effect with vivid colors and come with the same exact mounting options. In some conditions it will be hard to differenciate them! The HD Metal Print will be able to render slightly richer black, brighter white and more saturated colors. This is an advantage if you want to generate a high impact colorful and contrasted result. Max size is 60x40 The Acrylic print will provide very precise and sharp details, and the thickness of the acrylic (1/8 or 3/16 inches) will provide a nice optical depth. And you can reach larger print size up to 96x60. If your image doesn't require to reach extreme color gamut and very high contrast, you will be very fine with acrylic print that still provide very vivid result with a smaller budget.