How does "Brownulated" light brown sugar compare with regular light brown sugar?
Your question seems to be conflating the question of bag vs boxed brown sugar with the question of "Brownulated" light brown sugar vs. regular light brown sugar.

Brownulated pours like white sugar, but turns into a paste when it gets damp or wet. I think it tastes funny.

Boxed vs Bag sugar is just a matter of storage and convenience. It's the same sugar.