Side-by-side cook times, temperatures, and tips so you can decide which method works best.
Quick Answer
Slow Cooker is faster for pork ribs (about 8 min vs 25 min). Falls off the bone. Finish under broiler 5 min for bark.
Instant Pot, and on time it isn't close: 25 to 30 minutes against 8 to 10 hours for the same fall-off-the-bone result. What the slow cooker buys you is the ability to start it in the morning and forget it, plus it handles a full rack more comfortably than a pressure cooker where you're coiling the rack around the insert. Neither builds bark, so both need 5 minutes under the broiler with sauce at the end. That step isn't optional. It's the difference between ribs and boiled pork. Pull the membrane off the back of the rack before either one.
Head-to-Head
Instant Pot
Slow Cooker
Cook Time
25–30 min + 15 min release
8–10 hrs low / 5–6 hrs high
Temperature
High pressure
Low or High
Notes
Falls off the bone. Finish under broiler 5 min for bark.
Won't get bark, but incredibly tender. Broil to finish.