Screen size
equal specsWatch SE 31.8"
Watch Series 41.8"
Quick verdict
Watch SE 3 leads the measured specs 4-2.
Measured wins
Watch SE 3
4
spec wins
Overall winner
Ties
8
equal specs
Watch Series 4
2
spec wins
Screen size
equal specsTechnology
Watch SE 3
GSM / HSPA / LTE / 5G
Watch Series 4
GSM / HSPA / LTE
2G bands
Watch SE 3
GSM 850 / 900 / 1800 / 1900
Watch Series 4
GSM 850 / 900 / 1800 / 1900
3G bands
Watch SE 3
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - International, China, HK, HSDPA 850 / 1700(AWS) / 1900 / 2100 - USA, LATAM, Canada
Watch Series 4
HSDPA 850 / 900 / 2100 / 800 - Europe, Australia, HSDPA 850 / 1700(AWS) / 1900 / 800 - USA, LATAM, Canada, HSDPA 2100 - China
4G bands
Resolution
equal specsRefresh rate
Peak brightness
equal specsPixel density
equal specsCPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
equal specsIP rating
Wi‑Fi
Bluetooth
USB
5G support
NFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Watch SE 3
1, 2, 3, 4, 5, 6, 7, 8, 18, 19, 20, 25, 26, 28, 39, 40, 41, 66 - International, China, HK, 1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 17, 18, 19, 25, 26, 39, 40, 41, 66 - USA, LATAM, Canada
Watch Series 4
1, 3, 5, 7, 8, 18, 19, 20, 26 - Europe, Australia, 2, 4, 5, 12, 13, 17, 18, 19, 25, 26, 41 - USA, LATAM, Canada, 1, 3, 39, 40, 41 - China
5G bands
Watch SE 3
SA/NSA
Watch Series 4
-
Speed
Watch SE 3
HSPA, LTE, 5G
Watch Series 4
HSPA, LTE
Announced
Watch SE 3
2025, September 09
Watch Series 4
2018, September. Released 2018, September
Status
Watch SE 3
Available. Released 2025, September 19
Watch Series 4
Discontinued
Dimensions
Watch SE 3
44 x 38 x 10.7 mm (1.73 x 1.50 x 0.42 in)
Watch Series 4
44 x 38 x 10.7 mm (1.73 x 1.50 x 0.42 in)
Weight
Watch SE 3
26.4 g or 33 g (1.16 oz)
Watch Series 4
48 g (1.69 oz)
Build
Watch SE 3
Glass front, plastic/sapphire crystal back, aluminum frame
Watch Series 4
Glass front (Sapphire crystal), ceramic/sapphire crystal back, stainless steel frame
SIM
Watch SE 3
eSIM
Watch Series 4
eSIM
Other
Watch SE 3
50m water resistant
Watch Series 4
50m water resistant ECG certified (region dependent SW application; HW available on all models)
Type
Watch SE 3
Retina LTPO OLED, 1000 nits (peak)
Watch Series 4
Retina LTPO OLED, 1000 nits (peak)
Size
Watch SE 3
1.78 inches
Watch Series 4
1.78 inches
Resolution
Watch SE 3
448 x 368 pixels (~326 ppi density)
Watch Series 4
448 x 368 pixels (~326 ppi density)
Protection
Watch SE 3
Ion-X strengthened glass (2025 gen)
Watch Series 4
Sapphire crystal glass
Other
Watch SE 3
-
Watch Series 4
3D Touch display
OS
Watch SE 3
watchOS 26, upgradable to watchOS 26.2.1
Watch Series 4
watchOS 5.0, upgradable to watchOS 10.6.1
Chipset
Watch SE 3
Apple S10
Watch Series 4
Apple S4
CPU
Watch SE 3
Dual-core
Watch Series 4
Dual-core
GPU
Watch SE 3
PowerVR
Watch Series 4
PowerVR
Card slot
Watch SE 3
No
Watch Series 4
No
Internal
Watch SE 3
64GB
Watch Series 4
16GB 1GB RAM
Other
Watch SE 3
No
Watch Series 4
No
Loudspeaker
Watch SE 3
Yes
Watch Series 4
Yes
3.5mm jack
Watch SE 3
No
Watch Series 4
No
WLAN
Watch SE 3
Wi-Fi 802.11 b/g/n
Watch Series 4
Wi-Fi 802.11 b/g/n
Bluetooth
Watch SE 3
5.3, A2DP, LE
Watch Series 4
5.0, A2DP, LE
Positioning
Watch SE 3
GPS, GLONASS, GALILEO, QZSS
Watch Series 4
GPS, GLONASS, GALILEO, QZSS
NFC
Watch SE 3
Yes
Watch Series 4
Yes
Radio
Watch SE 3
No
Watch Series 4
No
USB
Watch SE 3
No
Watch Series 4
No
Sensors
Watch SE 3
Accelerometer, gyro, heart rate (2nd gen), barometer, always-on altimeter, compass, temperature (body)
Watch Series 4
Accelerometer, gyro, heart rate, barometer
Other
Watch SE 3
Media playback
Watch Series 4
Natural language commands and dictation (talking mode)
Type
Watch SE 3
Li-Ion
Watch Series 4
Li-Ion 292 mAh (1.12 Wh), non-removable
Charging
Watch SE 3
Wireless, 80% in 45 min
Watch Series 4
Wireless
Colors
Watch SE 3
Midnight, Starlight
Watch Series 4
Space Black, Silver, Gold
Models
Watch SE 3
A3325, A3324, A3328, A3326, A3327, A3329, A3391, A3392
Watch Series 4
A1975, A1976, A2007, A2008
SAR
Watch SE 3
1.18 W/kg (head)
Watch Series 4
-
SAR EU
Watch SE 3
0.42 W/kg (head)
Watch Series 4
-
Price
Watch SE 3
€ 244.00
Watch Series 4
About 700 EUR