Better music?Demi but I love My Everything.
Bigger career overall? Demi only because she's been in the industry longer.
Better voice?They're both good but I think Demi. I love Ariana but sometimes I can't understand what she's saying in her songs...
Brighter future?Ariana. But Demi can have a bright future too depending on how good her future singles and album do.
Better music? - Demi
Bigger career overall? - Demi
Better voice? - Demi (her ability to show emotion so well gives her the edge for me, even though she's inconsistent)
Brighter future? - Probably Ariana, but both their careers will be bright even in the long run
