Screen size
Watch SE 31.8"
Watch Series 12 AluminumWinner: 2.0"+9.2%
Quick verdict
Watch Series 12 Aluminum leads the measured specs 6-2.
Measured wins
Watch SE 3
2
spec wins
Ties
5
equal specs
Watch Series 12 Aluminum
6
spec wins
Overall winner
Screen size
Technology
Watch SE 3
GSM / HSPA / LTE / 5G
Watch Series 12 Aluminum
GSM / HSPA / LTE / 5G
2G bands
Watch SE 3
GSM 850 / 900 / 1800 / 1900
Watch Series 12 Aluminum
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 12 Aluminum
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
Watch SE 3
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
equal specsMain camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
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 12 Aluminum
1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 38, 39, 40, 41, 66, 71
5G bands
Watch SE 3
SA/NSA
Watch Series 12 Aluminum
1, 2, 3, 5, 7, 8, 12, 14, 20, 25, 26, 28, 38, 40, 41, 66, 71 SA/NSA
Speed
Watch SE 3
HSPA, LTE, 5G
Watch Series 12 Aluminum
HSPA, LTE, 5G
Announced
Watch SE 3
2025, September 09
Watch Series 12 Aluminum
2026, September 09
Status
Watch SE 3
Available. Released 2025, September 19
Watch Series 12 Aluminum
Available. Released 2026, September 18
Dimensions
Watch SE 3
44 x 38 x 10.7 mm (1.73 x 1.50 x 0.42 in)
Watch Series 12 Aluminum
46 x 40 x 9.7 mm (1.81 x 1.57 x 0.38 in)
Weight
Watch SE 3
26.4 g or 33 g (1.16 oz)
Watch Series 12 Aluminum
31.5/32.2/38.6/39.5 g (1.13 oz)
Build
Watch SE 3
Glass front, plastic/sapphire crystal back, aluminum frame
Watch Series 12 Aluminum
Glass front (Ceramic Shield 2), zirconia back, aluminum case
SIM
Watch SE 3
eSIM
Watch Series 12 Aluminum
eSIM
Other
Watch SE 3
50m water resistant
Watch Series 12 Aluminum
IP6X certified 50m water resistant ECG certified (region dependent SW application; HW available on all models) Depth gauge to 6m
Type
Watch SE 3
Retina LTPO OLED, 1000 nits (peak)
Watch Series 12 Aluminum
Retina LTPO3 OLED, 2000 nits (peak)
Size
Watch SE 3
1.78 inches
Watch Series 12 Aluminum
1.96 inches
Resolution
Watch SE 3
448 x 368 pixels (~326 ppi density)
Watch Series 12 Aluminum
496 x 416 pixels (~326 ppi density)
Protection
Watch SE 3
Ion-X strengthened glass (2025 gen)
Watch Series 12 Aluminum
Ceramic Shield 2
Other
Watch SE 3
-
Watch Series 12 Aluminum
Wide-angle OLED
OS
Watch SE 3
watchOS 26, upgradable to watchOS 26.2.1
Watch Series 12 Aluminum
watchOS 27
Chipset
Watch SE 3
Apple S10
Watch Series 12 Aluminum
Apple S11
CPU
Watch SE 3
Dual-core
Watch Series 12 Aluminum
Dual-core
GPU
Watch SE 3
PowerVR
Watch Series 12 Aluminum
PowerVR
Card slot
Watch SE 3
No
Watch Series 12 Aluminum
No
Internal
Watch SE 3
64GB
Watch Series 12 Aluminum
64GB
Other
Watch SE 3
No
Watch Series 12 Aluminum
No
Loudspeaker
Watch SE 3
Yes
Watch Series 12 Aluminum
Yes
3.5mm jack
Watch SE 3
No
Watch Series 12 Aluminum
No
WLAN
Watch SE 3
Wi-Fi 802.11 b/g/n
Watch Series 12 Aluminum
Wi-Fi 802.11 b/g/n, dual-band
Bluetooth
Watch SE 3
5.3, A2DP, LE
Watch Series 12 Aluminum
5.3, A2DP, LE
Positioning
Watch SE 3
GPS, GLONASS, GALILEO, QZSS
Watch Series 12 Aluminum
GPS, GLONASS, GALILEO, QZSS, BDS
NFC
Watch SE 3
Yes
Watch Series 12 Aluminum
Yes
Radio
Watch SE 3
No
Watch Series 12 Aluminum
No
USB
Watch SE 3
No
Watch Series 12 Aluminum
No
Sensors
Watch SE 3
Accelerometer, gyro, heart rate (2nd gen), barometer, always-on altimeter, compass, temperature (body)
Watch Series 12 Aluminum
Accelerometer, gyro, always-on heart rate, barometer, always-on altimeter, compass, SpO2, VO2max, temperature (body), temperature (water)
Other
Watch SE 3
Media playback
Watch Series 12 Aluminum
Health Sensing System: third‑generation electrical heart sensor, always‑on optical heart sensor, blood oxygen sensor, temperature sensor Temperature sensing (0.01˚ accuracy) Ultra Wideband (UWB) support (gen2 chip) Media playback
Type
Watch SE 3
Li-Ion
Watch Series 12 Aluminum
Li-Ion
Charging
Watch SE 3
Wireless, 80% in 45 min
Watch Series 12 Aluminum
Wireless, 0-80% in 30 min
Colors
Watch SE 3
Midnight, Starlight
Watch Series 12 Aluminum
Dark Bronze, Light Gold, Black, Space Gray
Models
Watch SE 3
A3325, A3324, A3328, A3326, A3327, A3329, A3391, A3392
Watch Series 12 Aluminum
A3582, A3587
SAR
Watch SE 3
1.18 W/kg (head)
Watch Series 12 Aluminum
-
SAR EU
Watch SE 3
0.42 W/kg (head)
Watch Series 12 Aluminum
-
Price
Watch SE 3
€ 244.00
Watch Series 12 Aluminum
€ 439.00