Both Naruto and Sasuke deserve their powers . . . Naruto may have got Kurama (Sasuke got his Uchiha DNA due to his parents too, he didnt earn it) but taming it wasnt a piece of cake and two people only ever managed to tame a lesser biju, Naruto trained for SM, KM and befriended Kurama for BM (Thats a first ever feat) while Sasuke due to blessed bloodline got his power ups (Sasuke nowhere earned his Sharingan as a sperm, a lot of people lose their loved ones in Narutoverse but they do not awake MS, so it cant be earned but gifted) but those are his birthright so in a way rightfully his.