Screen size
AspenWinner: 2.4"+21%
Z5551.9"
Quick verdict
Aspen leads the measured specs 8-1.
Measured wins
Aspen
8
spec wins
Overall winner
Ties
3
equal specs
Z555
1
spec wins
Screen size
Technology
Aspen
GSM / HSPA
Z555
GSM
2G bands
Aspen
GSM 850 / 900 / 1800 / 1900
Z555
GSM 900 / 1800 / 1900 - Z555i, GSM 850 / 1800 / 1900 - Z555a
3G bands
Aspen
HSDPA 900 / 2100 , HSDPA 850 / 900 / 2100
Z555
-
Speed
Aspen
HSPA 7.2/2 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
USB
equal specs5G support
equal specsNFC
3.5mm jack
SD card
equal specsStereo speakers
Z555
-
GPRS
Aspen
-
Z555
Class 10
EDGE
Aspen
-
Z555
Class 10
Announced
Aspen
2010, February. Released 2010, July
Z555
2008, January. Released 2008, March
Status
Aspen
Discontinued
Z555
Discontinued
Dimensions
Aspen
117 x 60 x 12.5 mm (4.61 x 2.36 x 0.49 in)
Z555
95 x 49 x 16.5 mm (3.74 x 1.93 x 0.65 in)
Weight
Aspen
130 g (4.59 oz)
Z555
95 g (3.35 oz)
Keyboard
Aspen
QWERTY
Z555
-
SIM
Aspen
Mini-SIM
Z555
Mini-SIM
Type
Aspen
TFT resistive touchscreen, 65K colors
Z555
TFT, 256K colors
Size
Aspen
2.4 inches, 17.8 cm2 (~25.4% screen-to-body ratio)
Z555
1.9 inches, 11.4 cm2 (~24.4% screen-to-body ratio)
Resolution
Aspen
320 x 240 pixels, 4:3 ratio (~167 ppi density)
Z555
176 x 220 pixels (~148 ppi density)
Other
Aspen
XPERIA Panels
Z555
Gesture Control Second external OLED, mono display (128 x 36 pixels)
OS
Aspen
Microsoft Windows Mobile 6.5.3 Professional
Z555
-
Chipset
Aspen
Qualcomm MSM7227 Snapdragon S1
Z555
-
CPU
Aspen
600 MHz ARM 11
Z555
-
GPU
Aspen
Adreno 200
Z555
-
Card slot
Aspen
microSDHC (dedicated slot), 4 GB included
Z555
Memory Stick Micro (M2), up to 8 GB
Internal
Aspen
256MB RAM, 256MB ROM, 100MB
Z555
12MB
Phonebook
Aspen
-
Z555
1000 x 20 fields, Photo call
Call records
Aspen
-
Z555
30 received, dialed and missed calls
Single
Aspen
3.15 MP
Z555
1.3 MP
Video
Aspen
480p@15fps
Z555
No
Other
Aspen
No
Z555
No
Loudspeaker
Aspen
Yes
Z555
Yes
3.5mm jack
Aspen
Yes
Z555
No
Alert types
Aspen
-
Z555
Vibration; Downloadable polyphonic, MP3, AAC ringtones
WLAN
Aspen
Wi-Fi 802.11 b/g
Z555
No
Bluetooth
Aspen
2.1, A2DP
Z555
2.0, A2DP
Positioning
Aspen
GPS, A-GPS
Z555
No
Radio
Aspen
Stereo FM radio, RDS
Z555
Stereo FM radio, RDS
USB
Aspen
microUSB 2.0
Z555
2.0
Sensors
Aspen
Z555
Browser
Aspen
WAP 2.0/HTML (IE), RSS feeds
Z555
WAP 2.0/xHTML, RSS reader
Other
Aspen
MP3/eAAC+/WAV/WMA player MP4/H.264/WMV player Pocket Office Organizer Eco friendly materials Voice memo/dial Predictive text input
Z555
Dynamic themes Media player Shake control Predictive text input Organizer Voice memo
Messaging
Aspen
-
Z555
SMS, EMS, MMS, Email, Instant Messaging
Games
Aspen
-
Z555
Yes + downloadable
Java
Aspen
-
Z555
Yes, MIDP 2.0
Type
Aspen
Removable Li-Po 1500 mAh battery
Z555
Removable Li-Ion 930 mAh battery (BST-39)
Stand-by
Aspen
Up to 560 h (2G) / Up to 500 h (3G)
Z555
Up to 360 h
Talk time
Aspen
Up to 6 h 30 min (2G) / Up to 7 h 30 min (3G)
Z555
Up to 8 h 20 min
Music play
Aspen
Up to 12 h
Z555
-
Colors
Aspen
Iconic Black, White Silver
Z555
Diamond Black, Dusted Rose
SAR EU
Aspen
1.05 W/kg (head)
Z555
1.02 W/kg (head)
Price
Aspen
About 70 EUR
Z555
About 80 EUR