For video inputs with a DDC data bus, I found that the EDID data is typically different for each input on the same display device, even when compared against two or more HDMI inputs.
One reason why is that different inputs might support different capabilities (even on HDMI inputs), and for digital inputs, a good chance that the HDCP key is different for each input.
One reason why is that different inputs might support different capabilities (even on HDMI inputs), and for digital inputs, a good chance that the HDCP key is different for each input.