Head-to-head · Best Single-Serve Coffee Makers

Keurig K-Duo Single Serve and Carafe Coffee Maker vs Keurig K-Supreme Plus Smart Single Serve Coffee Maker

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Keurig K-Supreme Plus Smart Single Serve Coffee Maker comes out ahead by a clear margin (3.3 vs 4.7). The gap is mostly about users wanting balance of convenience and coffee quality — read the strengths below before deciding.

Ranked #7 in Best Single-Serve Coffee Makers

Keurig K-Duo Single Serve and Carafe Coffee Maker

3.3

3 sources2 derived

The Keurig K-Duo Single Serve & Carafe Coffee Maker brews K-Cup pods and ground coffee in carafe sizes up to 12 cups, so it covers both. GearLab's review went after brew quality, finding the machine never reaches industry-standard water temperatures and doesn't distribute water evenly. It's easy to operate and keeps coffee warm for hours, but the missing customizable settings and inconsistent results across multiple batches count against heavy users. Flexibility between pod and drip brewing is the reason to buy; premium coffee quality isn't.

Strengths

— Makes single servings and carafes
— Adjustable water reservoir allows for flexible counter space usage
— Easy to use and set up with simple button operations

Watch-outs

— Settings are not very customizable
— Brew quality is compromised with subpar water temperature and distribution

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Higher ratedRanked #1 in Best Single-Serve Coffee Makers

Keurig K-Supreme Plus Smart Single Serve Coffee Maker

4.7

2 sources$199.99as of Jul 31

The Keurig K-Supreme Plus Smart Single Serve Coffee Maker uses Keurig's MultiStream technology, which punches five holes in a K-Cup pod instead of one to improve extraction. Reviewers said coffee quality benefits, and brew strength, temperature, and drink sizes are all adjustable. Others criticized the brew temperature and extraction time as still short of where they should be. The price is premium, which pushes it out of reach for budget buyers. It fits people who want convenience plus decent coffee quality but don't need the full smart connectivity of the K-Supreme Smart model.

Strengths

— MultiStream technology improves coffee extraction and flavor
— Offers 6 brew size options (6-12 oz) and 5 strength settings
— Includes programmable buttons for saved brewing preferences

Watch-outs

— Brew temperature still too low for optimal extraction
— Extraction time remains insufficient for full flavor development
— Price is fairly high compared to basic models

$199.99 · Check Price on Amazon Full review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

Keurig K-Duo Single Serve and Carafe Coffee Maker

The K-Duo offers versatility between pod and drip brewing, a feature not available in the Nespresso Vertuo Next or Essenza Mini, but it's less customizable than the Keurig K-Elite and K-Supreme Plus in terms of brew settings. While it's user-friendly, its brew quality is compromised compared to the Keurig K-Elite and K-Supreme Plus, which offer better temperature control and extraction.

Keurig K-Supreme Plus Smart Single Serve Coffee Maker

The K-Supreme Plus introduces MultiStream technology that improves extraction quality compared to the Keurig K-Elite and K-Classic, but it's more expensive and still falls short of optimal brew temperatures. Unlike the Ninja DualBrew Pro, it lacks a built-in milk frother, and while it offers more customization than the K-Mini Plus, it's less compact and doesn't support ground coffee brewing.

Specs side-by-side

Spec	Keurig K-Duo Single Serve and Carafe Coffee Maker	Keurig K-Supreme Plus Smart Single Serve Coffee Maker
Brewing Methods	K-Cup pods and ground coffee	hot and iced
Features	Yes, up to 4-5 hours	BrewID, MultiStream Technology, and WiFi
Wattage	1500W	—
Material	Stainless Steel	Stainless Steel
Brew Sizes	6-12 ounces	6-12 ounces
Compatibility	K-Cup pods	K-Cup pods
Voltage	120V	—
Dimensions	7.68"D x 15.88"W x 14.9"H	12.2H x 7.9W x 12D inches
Water Capacity	—	66 ounces
Weight	—	5.8 lb

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