Which product is better for keeping the heat out? UltraCool-IR8360 IR and UV Blocking Solar Film or Ultracool-S1560 15% Silver Window Film?

You have two films on opposite ends of the spectrum. The 8360 is very clear and lets in all of the light. It does stop a fair amount of heat. The 1560 is super dark, mirrored and stops almost 80% of the heat. If it's all about heat, then the 1560 is better, but will have a shiny silver mirror look. 8360 is invisible on the glass.