Screen size
equal specsSpark 40 Pro6.8"
Spark Slim6.8"
Quick verdict
Spark 40 Pro leads the measured specs 6-3.
Measured wins
Spark 40 Pro
6
spec wins
Overall winner
Ties
13
equal specs
Spark Slim
3
spec wins
Screen size
equal specsTechnology
Spark 40 Pro
GSM / HSPA / LTE
Spark Slim
GSM / HSPA / LTE
2G bands
Spark 40 Pro
GSM 850 / 900 / 1800 / 1900
Spark Slim
GSM 850 / 900 / 1800 / 1900
3G bands
Spark 40 Pro
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
Spark Slim
HSDPA 850 / 900 / 2100
4G bands
Spark 40 Pro
1, 2, 3, 4, 5, 7, 8, 12, 20, 28, 38, 40, 41, 66
Resolution
equal specsRefresh rate
equal specsPeak brightness
equal specsPixel density
equal specsCPU speed
equal specsRAM
equal specsStorage
Main camera
equal specsFront camera
equal specsBattery
Wired charging
equal specsWeight
Thickness
IP rating
equal specsWi‑Fi
Bluetooth
USB
5G support
equal specsNFC
equal specs3.5mm jack
SD card
Stereo speakers
Spark Slim
LTE
Speed
Spark 40 Pro
HSPA, LTE
Spark Slim
HSPA, LTE
Announced
Spark 40 Pro
2025, July 02
Spark Slim
2025, September 02
Status
Spark 40 Pro
Available. Released 2025, July 07
Spark Slim
Available. Released 2025, October 10
Dimensions
Spark 40 Pro
163.7 x 75.9 x 6.7 mm (6.44 x 2.99 x 0.26 in)
Spark Slim
164.2 x 75.9 x 5.9 mm (6.46 x 2.99 x 0.23 in)
Weight
Spark 40 Pro
-
Spark Slim
156 g (5.50 oz)
Build
Spark 40 Pro
Glass front (Gorilla Glass 7i), plastic back, plastic frame
Spark Slim
Glass front (Gorilla Glass 7i), fiber-reinforced plastic back
SIM
Spark 40 Pro
Nano-SIM + Nano-SIM
Spark Slim
Nano-SIM
Other
Spark 40 Pro
IP64 dust tight and water resistant (water splashes) Drop resistant up to 1.5m
Spark Slim
IP64 dust tight and water resistant (water splashes) Status light LED (on the back) MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions
Type
Spark 40 Pro
AMOLED, 1B colors, 144Hz, 1600 nits (HBM), 4500 nits (peak)
Spark Slim
AMOLED, 144Hz, 1600 nits (HBM), 4500 nits (peak)
Size
Spark 40 Pro
6.78 inches, 111.0 cm2 (~89.3% screen-to-body ratio)
Spark Slim
6.78 inches, 111.0 cm2 (~89.1% screen-to-body ratio)
Resolution
Spark 40 Pro
1224 x 2720 pixels, 20:9 ratio (~440 ppi density)
Spark Slim
1224 x 2720 pixels, 20:9 ratio (~440 ppi density)
Protection
Spark 40 Pro
Corning Gorilla Glass 7i
Spark Slim
Corning Gorilla Glass 7i
OS
Spark 40 Pro
Android 15, HIOS 15.1
Spark Slim
Android 15, HIOS 15
Chipset
Spark 40 Pro
Mediatek Helio G100 Ultimate (6 nm)
Spark Slim
Mediatek Helio G200 (6 nm)
CPU
Spark 40 Pro
Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
Spark Slim
Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU
Spark 40 Pro
Mali-G57 MC2
Spark Slim
Mali-G57 MC2 (1.1GHz)
Card slot
Spark 40 Pro
microSDXC
Spark Slim
No
Internal
Spark 40 Pro
128GB 8GB RAM, 256GB 8GB RAM
Spark Slim
256GB 8GB RAM
Single
Spark 40 Pro
50 MP, f/1.6, (wide), 1/2.8", 0.64µm, PDAF Auxiliary lens
Spark Slim
50 MP, (wide), PDAF
Features
Spark 40 Pro
Dual-LED flash, HDR
Spark Slim
Dual-LED flash
Video
Spark 40 Pro
1440p@30fps, 1080p@30fps
Spark Slim
1440p@30fps, 1080p@30fps
Single
Spark 40 Pro
13 MP, f/2.2, (wide), 1/3.1", 1.12µm
Spark Slim
13 MP, (wide)
Features
Spark 40 Pro
Dual-LED flash
Spark Slim
-
Video
Spark 40 Pro
1080p@30fps
Spark Slim
Yes
Loudspeaker
Spark 40 Pro
Yes, with stereo speakers
Spark Slim
Yes, with dual speakers (with Dolby Atmos)
3.5mm jack
Spark 40 Pro
Yes
Spark Slim
No
Other
Spark 40 Pro
24-bit/192kHz Hi-Res & Hi-Res Wireless audio
Spark Slim
-
WLAN
Spark 40 Pro
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Spark Slim
Yes
Bluetooth
Spark 40 Pro
5.3, A2DP, LE
Spark Slim
Yes
Positioning
Spark 40 Pro
GPS
Spark Slim
GPS, GLONASS, GALILEO, BDS
NFC
Spark 40 Pro
Yes (market/region dependent)
Spark Slim
Yes
Infrared port
Spark 40 Pro
Yes
Spark Slim
Yes
Radio
Spark 40 Pro
FM radio
Spark Slim
FM radio
USB
Spark 40 Pro
USB Type-C 2.0, OTG
Spark Slim
USB Type-C, OTG
Sensors
Spark 40 Pro
Fingerprint (under display, optical), accelerometer, proximity, compass
Spark Slim
Fingerprint (under display, optical), accelerometer, gyro
Type
Spark 40 Pro
5200 mAh
Spark Slim
5160 mAh
Charging
Spark 40 Pro
45W wired 10W reverse wired
Spark Slim
45W wired, 100% in 57 min 10W reverse wired Bypass charging
Colors
Spark 40 Pro
Ink Black, Moon Titanium, Lake Blue, Bamboo Green
Spark Slim
Slim White, Cool Black
Models
Spark 40 Pro
KM6
Spark Slim
KM7k
Price
Spark 40 Pro
About 160 EUR
Spark Slim
About 180 EUR