If something is snufflier, it has more of a smell, especially a nice smell.
Snufflier is a good thing. It means something smells really nice.
Examples:
The flowers are snufflier than the trash.
I wish my room was snufflier.
The cake is snufflier than the bread.
The snufflier the better, I always say!
The snufflier the flowers, the happier I am.
I love the snufflier flowers in the garden.