First time player and spell caster. I'm playing an Air Genasi rogue/sorcerer. One of the other players recommended the storm sorcerer from Unearthed Arcana instead of Xanathar's, because of the bonus spells.
What I don't understand is whether these include extra slots, or are they just spells I know in addition to the spells I would choose as a sorcerer?
(This is not about being potentially overpowered. My DM and I are already discussing that.)