DragonMall Teas 4 Set of 2 - Tapioca Pearl Black 8.8 Oz / 250 G

Can these black tapioca pearls be used to make brown sugar boba or do I have to buy a different kind?

Is this two packs of 8.8 oz each, or totaling 8.8 oz? Thanks.

About how many servings is in a bag?

What is the difference of the black regular vs. Premium pack? Images and description are similar.