What exactly puts the "e" in S10e, and keeps it out of the S10? Let's see if the specs tell us anything:

Super AMOLED Infinity-O displays—5.8" (2280 × 1080) on the S10e and 6.1" (3040 × 1440) on the S10

Qualcomm Snapdragon 855 processor (or Samsung Exynos 9820 in some regions)

10-megapixel selfie camera and a rear-facing camera, with one dual-aperture 12 MP wide-angle module and one 16 MP ultra wide module—plus, the S10 gets one additional 12 MP telephoto module

A conventional fingerprint sensor in the S10e's side button, vs. the new ultrasonic fingerprint sensor hidden under the S10's display

Headphone jack and microSD card slot

IP68 water/dust-resistance rating