They are actually the same cut of veil just made from two different types of tulle. Niacae is made from our 'traditional tulle' which has a little body and volume and gives you that very traditional veil look. Niacae works with virtually all dresses. See real brides wearing our Niacae.
Isabella is made from our 'silk style tulle' which drapes and falls like silk without the hefty price tag. This tulle is very soft and falls straight down with no volume at all. Isabella works best with slim fitting dresses. See real brides wearing Isabella.
We hope this helps, please do get in touch if you need any help styling your wedding dress.