At my swatches the Airy Chambray seems to be a tad more blue than the Slubby Chambray, but the Slubby looks brighter because of the grain. The Airy is very light, probably airy, but also very prone to wrinkle.
Against backlight it looks like this:
Left: Denim Slubby Chambray Right: Airy Indigo Chambray
The weave of the Airy Indigo is much finer, it looks quite sheer against the light, the Slubby is much thicker with thicker yarn, but "mesh openings" seems bigger.