Head-to-head

Instant Pot - Vortex Plus 6 Quart vs Ninja - Double Stack XL SL400

Last updated May 31, 2026 · How Mars Score works

Probe A

Instant Pot

Vortex Plus 6 Quart

59.9/ 100C

Power69· 40%

Capacity46· 30%

Features—· 30%

Probe B

Ninja

Double Stack XL SL400

76.5/ 100B

Power92· 40%

Capacity55· 30%

Features—· 30%

Quick verdict

Between the Vortex Plus 6 Quart and Double Stack XL SL400, the Vortex Plus 6 Quart comes out ahead in presets, while the Double Stack XL SL400 wins on capacity and wattage. Overall, the Vortex Plus 6 Quart scores 59.9 and the Double Stack XL SL400 scores 76.5 on our Mars Score.

Buying advice

Which should you buy?

The Double Stack XL SL400 is the clear pick on raw spec strength, leading by 16.6 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.

Pick the Vortex Plus 6 Quart if you care most about presets. The biggest gaps in its favor are presets.

Pick the Double Stack XL SL400 if you care most about capacity and wattage. Its strongest claims are capacity, wattage, max temperature, among others.

There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.

Bottom line: the Double Stack XL SL400 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.

Why Instant Pot - Vortex Plus 6 Quart wins

▲Presets — 1.00 more. 7 vs 6.

Why Ninja - Double Stack XL SL400 wins

▲Capacity — 66.67% more. 9.5 L vs 5.7 L.
▲Wattage — 41.18% more. 2400 W vs 1700 W.
▲Max temperature — 13.73% more. 232 °C vs 204 °C.
▲Has Dual zone.

Full readout

Spec comparison

Capacity

Spec	Instant Pot - Vortex Plus 6 Quart	Ninja - Double Stack XL SL400
Capacity	5.7 L	9.5 Llead
Dual zone	false	truelead

Power

Spec	Instant Pot - Vortex Plus 6 Quart	Ninja - Double Stack XL SL400
Wattage	1700 W	2400 Wlead
Max temperature	204 °C	232 °Clead

Features

Spec	Instant Pot - Vortex Plus 6 Quart	Ninja - Double Stack XL SL400
Presets	7lead	6
Smart app	false	false
Dishwasher-safe	true	true
Noise	60 dB	60 dB

Drill down

Spec-level deep dives

Capacity→Dual zone→Wattage→Max temperature→Presets→Smart app→Dishwasher-safe→Noise→

By manufacturer

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