I am using a packed texture with different noises into each channel (I need 4 channels RGBA). I noticed using the Masks texture compression (often recommended when using packed textures), the textures are considerably degraded when compared to the original (which can be seen more or less using the UserInterface2D compression settings). Of course the Masks compression performs better in terms of output size, but the quality degradation is questionable. See below for an example.
Can we control the compression ratio for each compression type ?