quick hard sample for super-xbr chroma ar and bilateral chroma:
start at 150 sharpness, toggle between super-xbr fast ar and slow ar.
madvr.avs
Code:
BlankClip()
Subtitle("ONE, TWO, THREE, OUR CHROMA", x=-1, y=150, size=36, spc=4, font="Microsoft Sans Serif", text_color=$aa0000, halo_color=$262626)
converttoyv12.sharpen(0.4)
you can see that fast chroma ar is superior on this image, perhaps it could be a quality/performance option for super-xbr luma/image.