Screen size
W7152.4"
W8578Winner: 3.5"+31%
Quick verdict
W8578 leads the measured specs 7-2.
Measured wins
W715
2
spec wins
Ties
4
equal specs
W8578
7
spec wins
Overall winner
Screen size
Technology
W715
GSM / HSPA
W8578
GSM / HSPA
2G bands
W715
GSM 900 / 1800 / 1900 - SIM 1, GSM 900 / 1800 / 1900 - SIM 2
W8578
GSM 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
W715
HSDPA 2100
W8578
HSDPA 900 / 2100
Speed
W715
HSPA 3.6/0.384 Mbps
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
equal specs5G support
equal specsNFC
3.5mm jack
SD card
equal specsStereo speakers
W8578
HSPA 3.6/0.384 Mbps
Announced
W715
2011, July. Released 2011, July
W8578
2014, April. Released 2014, April
Status
W715
Discontinued
W8578
Discontinued
Dimensions
W715
113.5 x 49.6 x 16.5 mm (4.47 x 1.95 x 0.65 in)
W8578
116 x 60 x 21 mm (4.57 x 2.36 x 0.83 in)
Weight
W715
-
W8578
217 g (7.65 oz)
SIM
W715
Dual SIM (Mini-SIM)
W8578
Dual SIM
Type
W715
TFT, 256K colors
W8578
TFT, 256K colors
Size
W715
2.4 inches, 17.8 cm2 (~31.7% screen-to-body ratio)
W8578
3.5 inches, 34.9 cm2 (~50.1% screen-to-body ratio)
Resolution
W715
240 x 320 pixels, 4:3 ratio (~167 ppi density)
W8578
480 x 800 pixels, 5:3 ratio (~267 ppi density)
Other
W715
-
W8578
Secondary TFT, 256K colors 240 x 320 pixels, 2.6 inches
Card slot
W715
microSDHC (dedicated slot)
W8578
microSDHC (dedicated slot)
Phonebook
W715
Yes, Photocall
W8578
-
Call records
W715
Yes
W8578
-
Internal
W715
80MB
W8578
512MB 256MB RAM
Single
W715
3.15 MP
W8578
5 MP
Video
W715
320p@15fps
W8578
Yes
Features
W715
-
W8578
LED flash
Single
W715
Yes
W8578
-
Video
W715
W8578
-
Other
W715
-
W8578
No
Loudspeaker
W715
Yes
W8578
Yes
3.5mm jack
W715
No
W8578
Yes
WLAN
W715
No
W8578
Wi-Fi 802.11 b/g
Bluetooth
W715
2.1, A2DP, EDR
W8578
2.1, EDR
Positioning
W715
No
W8578
No
Radio
W715
Stereo FM radio, RDS
W8578
FM radio
USB
W715
miniUSB 2.0
W8578
microUSB 2.0
NFC
W715
-
W8578
No
Sensors
W715
W8578
Accelerometer
Messaging
W715
SMS(threaded view), MMS, Email
W8578
-
Games
W715
Yes
W8578
-
Java
W715
Yes, MIDP 2.0
W8578
-
Other
W715
MP3/WAV/AAC+ player MP4/H.263 player Organizer Voice memo Predictive text input
W8578
SNS integration MP3/WAV/WMA/eAAC+ player MP4/H.263 player Document viewer Photo viewer Organizer Voice memo Predictive text input
Type
W715
Removable Li-Ion 1900 mAh battery
W8578
Li-Ion 2000 mAh, removable
Stand-by
W715
Up to 545 h (2G) / Up to 950 h (3G)
W8578
Up to 850 h
Talk time
W715
Up to 22 h (2G) / Up to 12 h (3G)
W8578
Up to 9 h
Colors
W715
Black
W8578
Black
OS
W715
-
W8578
Android 4.2 (Jelly Bean)