Dtilt - A quick kill move up close or a spacing move at a distance. Frame 9. Kills around 125-135% with the close hitbox. Its fairly safe on shield if spaced. As a kill move it's good at punishing things on shield that are at least -13 after shieldstun, espically fsmashes that are power shielded since you won't be pushed away.
Utilt - Combo starter at low %, kill move at 125-135%. Frame 7. Laggy (33 frames of cooldown). Combos into upsmash and upair at low percents. Has a deceptively large hitbox. Can stuff out aerial approaches. Best used to cover getup options at ledge due to having lots of active frames. Covers normal getup, most getup attacks, ledge jump and some ledge drop > aerial options.