Jass Manak is a better Singer than Jassi Gill. Jass Manak’s voice is great without auto-tune, whether Jassi Gill’s voice without auto-tune is not as much as same as his auto-tuned voice. Also, Jass Manak sings his song on a high note and at the high pitch which is very difficult, but he sings very awesome at high note without an auto-tuner, but Jassi Gill uses an auto-tuner for high pitch voice.