The two tablets have nearly identical dimensions. The newer S3 adds a little bit of thickness, but it's still quite thin at only 6 mm.
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There are more noticeable differences in weight. The lightest Tab S3 is about 9-percent heavier than its S2 counterpart.
Samsung has classed up the Tab S3 by using glass instead of plastic for the back panel.
Both tablets are available in black or silvery-white. The gold option was scrapped for the newer tablet.
Both tablets have 9.7-inch displays with 4:3 aspect ratios.
The two displays also have identical resolution.
The Tab S3's display supports HDR, or high dynamic range. It is capable of displaying a larger range of colors, which should make for more vivid visuals.
The Tab S3 has also been improved to include four speakers instead of two. This should make for an better listening experience, especially as you hold the display in different orientations.
Both tablets can be unlocked with a tap of your finger.
They're also both available in either Wi-Fi only or Wi-Fi+LTE models.
The Tab S3 connects with its keyboard accessory in a more user-friendly way than the Tab S2. While the Tab S2 supported Bluetooth keyboards, Samsung's Tab S3 pogo keyboard cover (which snaps into place with pins) does not need charging. It it sold separately for $130.
The Tab S3 is also bundled with a version of Samsung's S Pen stylus.
The Tab S3 adheres to the newer USB-C standard, while the older edition has a microUSB charging port.
The Tab S2 was built with Samsung's own Exynos chip, but the Tab S3 uses a Qualcomm Snapdragon 820 processor.
The newer tablet has an additional gigabyte of RAM.
The Tab S3 is only available in one 32 GB size, dropping the 64 GB option of the Tab S2.
But if you're concerned about space, both offer expandable storage via microSD. Samsung lists the Tab S3 as supporting cards up to 256 GB, and the Tab S2 at up to 128 GB.
If you're the type to use your tablet for photography, the Tab S3 takes sharper captures.
The Tab S3 has a slightly larger battery than its predecessor. Samsung estimates "up to 12 hours video" for both devices.
Split screen multitasking
Both operating systems allow you to see two apps side by side for better multi-tasking. However, not all apps support split screens.
The Galaxy Tab S3 was revealed earlier this month at the Mobile World Congress; it hits US shelves March 24. The Tab S2 was released back in August of 2015.
The Tab S3 starts off $100 more expensive than its earlier generation did. If you decide to buy a Tab S2 at this point, make sure to shop around for a good deal. Discounts are easy to come by at this point.
To read more, check out our hands-on impressions of the Tab S3.