Spectra S1 vs S2 – Buying Guide and Full Comparison

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Choosing to breastfeed your baby will probably result in you having to buy a breast pump at one point. This handy device is essential to have for any mom who wants to increase their milk supply or who wants to give their baby a bottle of expressed milk, but which breast pump should you invest in?

In this article, we’ll compare the features of two of our favorite breast pumps on the market. After reading this Spectra S1 vs S2 guide, you should find it easier to pick the right one for your needs.

If you need to know more, we have a full review of the Spectra S2 here!

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Spectra S2 Hospital Grade Breast Pump

Comparing Spectra S1 vs. S2 Breast Pumps

Although many people think that the two spectra pumps are nearly identical, there are a few differences you may want to consider before buying either.

Let’s discuss their similarities first.

Spectra – S1 Plus Electric Breast Milk Pump for Baby Feeding

Type of Pump

When it comes to the system type of Spectra breast pumps, you’ll find that both the S1 and Spectra S2 are double electric breast pumps and are both closed system pumps. Closed system means that the pumped milk doesn’t reach the pump itself. This helps keep mold and bacteria away from both the milk and the pump.

Of course, this is a huge advantage to have in a breast pump, unlike an open-system pump. Both models are great candidates when making up your mind about the type of breast pump.

spectra s1 vs spectra s2
spectra s1 vs spectra s2

Settings Personalization

Here’s another feature that both products include. The ability to personalize your pump’s settings can be especially useful because your milk supply will change with time.

In Spectra S1 and S2, you could adjust the settings to suit your body needs. For instance, you’ll be able to control the suction speed and power using the simple-to-use buttons available. With up to 12 levels of suction power, both of these pumps have plenty of adjustment to make them as efficient and comfortable as possible.

Spectra – S2 Plus Electric Breast Milk Pump for Baby Feeding
spectra s2 full review on pink background with image of s2

A magnificent quality that both pumps have is that they’re quiet to the point of near silence. Of course, you’ll need this feature if you prefer to pump milk next to a sleeping baby.

Also, many mothers choose to use a breast pump at night after they’ve finished all their work and chores. So, working in silence will always be a priority not to disturb anyone else in their household. Here, picking either the S1 or S2 should work out great for you!


In terms of strength, the Spectra S1 and S2 offer the same level of durability. Both models are hospital-grade, which means that they’re almost ten times more powerful than a typical breast pump.

Besides, these two machines are made of BPA-free plastic, ensuring that the milk stays clear of BPA-related issues. When it comes to the health of your baby, you can rest assured that Spectra S1 and S2 has made sure it’s a top priority.

Motor Power

One of the most important factors that you should research deeply is how powerful a breast pump motor is. And although many people assume that a pump can’t be as efficient as a baby in getting milk from the breast, this isn’t the case with the S1 and S2.

Both models come with incredible motor power, offering up to 250mmHg of suction rate. In other words, this means faster pumping and more milk pumped per session. To a super busy mother, this impressive power can be life-saving in many scenarios.

So far, both Spectra models were able to keep up with each other. Now, what makes the S1 different from the S2?

spectra s1 or s2
Mother holding Automatic breast pump machine and pumping milk in garden with foliage sunset bokeh background. breastmilk is the best healthy nutrition food for newborn baby.

Rechargeable Battery

The main advantage that the S1 has over the S2 is that it contains a built in rechargeable battery, meaning that the S1 is far more portable than the S2 pump. For many pumping mothers, this feature may not be crucial because they’ll always use a breast pump at home.

Other moms can highly benefit from a portable pump if they’re always on the go. Sure, this feature will cost you a little more, but it can be worth it if you travel a lot and need to use the pump anywhere.

spectra s2 vs s9 plus
spectra s2 vs s9 plus


Both models are a bit on the expensive side when compared to other pumps on the market. Yet, because of their solid features and hospital-grade build, we think that their price is justified.

Still, the S2 model is more affordable than the S1 due to the lack of a rechargeable battery. So, if you’re on a tight budget and don’t need a portable pump, you should consider getting Spectra S2.

On the other hand, the S1 model should be perfect if money isn’t an issue.


While this isn’t a big deal to most, Spectra S1 and S2 don’t come in the same color. The S1 is only available in blue, while S2 is pink.

spectra breast pump

Night Light

Both the spectra s1 and the spectra s2 have a night light, which has 2 brightness settings.

Wrapping Up

Comparing Spectra S1 vs. S2 breast pumps can seem nearly impossible because both models come with awesome features. They’re both sturdy machines that offer great power, personalized settings, and silent operation.

Both the Spectra S1 and the S2 are excellent breast pumps for increasing breast milk supply.

spectra breast pump night light

To determine the best one for you, you’ll only have to make up your mind about the difference in price and whether you’ll need a portable pump.

The biggest difference between spectra s1 and s2 is that the s1 has a built in rechargeable battery, while the s2 will require wall power to use.

Once you figure these two points out, your decision should come naturally to you.

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