6 reasons you should buy a Galaxy Note 9 instead of the Galaxy S9

The Galaxy Note 9 has a whopping 4,000 mAH battery, compared to the 3,000 and 3,500 mAH batteries in the Galaxy S9 and S9+, respectively.

While the latter phones get plenty of battery life — 17 to 20 hours of video playback, and 31 to 35 hours of talk time — the Galaxy Note 9 should be able to get even more time out of each charge.

If you're ever worried about your phone's storage, the Galaxy Note 9 is the way to go.

The Galaxy S9 and S9+ both feature 64 GB of built-in storage, with a microSD slot that supports up to 400 GB.

The Galaxy Note 9, on the other hand, features either 128 GB or 512 GB of built-in storage, depending on which model you choose, and its microSD slot can support up to another 512 GB of space. That means you could have over 1 terabyte of space in your Galaxy Note 9. As Keanu Reeves would say, "Whoa."

The Galaxy S9 comes with either 4GB or 6GB of RAM, or random-access memory, which essentially helps with multitasking: The more RAM you have in your device, the better it will be at juggling multiple apps simultaneously, so you can switch back and forth between them without interruption.

The Galaxy Note 9, however, comes with either 6GB of RAM to start, or you can opt for the high-end model with 8GB of RAM, which also comes with 512GB of on-board storage. The extra RAM will help if you do a ton of work on your phone, but it will also come in handy for gaming as well, like if you want to use your Galaxy Note 9 to play "Fortnite."

The S Pen has been one of the main differentiating features between Samsung's Galaxy S and Galaxy Note lines, and this year it's much improved.

This year's S Pen is water resistant (up to 5 meters of water for 30 minutes), and can get 30 minutes of power in just 40 seconds of charge time. More importantly, the S Pen supports several nifty features, like using it as a remote to take photos, or control music and video playback. It's also good for drawing on top of your photos or videos, making GIFs out of your videos, or writing handwritten messages. You can also use the S Pen to take notes within the Samsung Notes app, which supports various brushes, pens and colors so you can draw as well as write, and a cool feature called Screen off Memo lets you make notes right on the Note 9's display without needing to unlock the phone.

The S Pen is also good for switching back and forth between apps, zooming into photos or maps, or even translating words or converting currencies. Since the Galaxy S9 doesn't support the S Pen, all of these features are exclusive to the Galaxy Note series.

This isn't a big difference, but if you care about owning the latest software, the Galaxy S9 and S9+ are only pre-loaded with Android 8.0 Oreo, while the newer Galaxy Note 9 is loaded with Android 8.1.

That said, Android 8.1 isn't significantly different than Android 8.0, and neither phone yet supports Android 9.0 Pie, which is the latest mobile software from Google.