Screen size
AspenWinner: 2.4"+21%
Z5501.9"
Quick verdict
Aspen leads the measured specs 9-1.
Measured wins
Aspen
9
spec wins
Overall winner
Ties
2
equal specs
Z550
1
spec wins
Screen size
Technology
Aspen
GSM / HSPA
Z550
GSM
2G bands
Aspen
GSM 850 / 900 / 1800 / 1900
Z550
GSM 900 / 1800 / 1900 - Z550i, GSM 850 / 1800 / 1900 - Z550a
3G bands
Aspen
HSDPA 900 / 2100 , HSDPA 850 / 900 / 2100
Z550
-
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
5G support
equal specsNFC
3.5mm jack
SD card
equal specsStereo speakers
Z550
-
GPRS
Aspen
-
Z550
Class 10
EDGE
Aspen
-
Z550
No
Announced
Aspen
2010, February. Released 2010, July
Z550
2006, May
Status
Aspen
Discontinued
Z550
Discontinued
Dimensions
Aspen
117 x 60 x 12.5 mm (4.61 x 2.36 x 0.49 in)
Z550
87.5 x 45.4 x 20 mm (3.44 x 1.79 x 0.79 in)
Weight
Aspen
130 g (4.59 oz)
Z550
93 g (3.28 oz)
Keyboard
Aspen
QWERTY
Z550
-
SIM
Aspen
Mini-SIM
Z550
Mini-SIM
Type
Aspen
TFT resistive touchscreen, 65K colors
Z550
TFT, 256K colors
Size
Aspen
2.4 inches, 17.8 cm2 (~25.4% screen-to-body ratio)
Z550
1.9 inches, 30 x 37 mm, 11.4 cm2 (~28.6% screen-to-body ratio)
Resolution
Aspen
320 x 240 pixels, 4:3 ratio (~167 ppi density)
Z550
176 x 220 pixels (~148 ppi density)
Other
Aspen
XPERIA Panels
Z550
Second external STN, mono display (128 x 36 pixels) Wallpapers, screensavers
OS
Aspen
Microsoft Windows Mobile 6.5.3 Professional
Z550
-
Chipset
Aspen
Qualcomm MSM7227 Snapdragon S1
Z550
-
CPU
Aspen
600 MHz ARM 11
Z550
-
GPU
Aspen
Adreno 200
Z550
-
Card slot
Aspen
microSDHC (dedicated slot), 4 GB included
Z550
Memory Stick Micro (M2), up to 2 GB
Internal
Aspen
256MB RAM, 256MB ROM, 100MB
Z550
25MB
Phonebook
Aspen
-
Z550
1000 entries, Photocall
Call records
Aspen
-
Z550
30 received, dialed and missed calls
Single
Aspen
3.15 MP
Z550
1.3 MP
Video
Aspen
480p@15fps
Z550
QCIF
Other
Aspen
No
Z550
No
Loudspeaker
Aspen
Yes
Z550
Yes
3.5mm jack
Aspen
Yes
Z550
No
Alert types
Aspen
-
Z550
Vibration; Downloadable polyphonic, MP3, AAC ringtones, composer
WLAN
Aspen
Wi-Fi 802.11 b/g
Z550
No
Bluetooth
Aspen
2.1, A2DP
Z550
Yes
Positioning
Aspen
GPS, A-GPS
Z550
No
Radio
Aspen
Stereo FM radio, RDS
Z550
Stereo FM radio, RDS
USB
Aspen
microUSB 2.0
Z550
Proprietary
Sensors
Aspen
Z550
Browser
Aspen
WAP 2.0/HTML (IE), RSS feeds
Z550
WAP 2.0/HTML (NetFront), 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
Z550
Push to talk Media player (MP3, 3GP, AAC, MP4) Predictive text input Photo editor Organizer Voice memo
Messaging
Aspen
-
Z550
SMS, MMS, Email
Games
Aspen
-
Z550
Yes + downloadable
Java
Aspen
-
Z550
Yes, MIDP 2.0
Type
Aspen
Removable Li-Po 1500 mAh battery
Z550
Removable Li-Ion 750 mAh battery
Stand-by
Aspen
Up to 560 h (2G) / Up to 500 h (3G)
Z550
Up to 320 h
Talk time
Aspen
Up to 6 h 30 min (2G) / Up to 7 h 30 min (3G)
Z550
Up to 5 h
Music play
Aspen
Up to 12 h
Z550
-
Colors
Aspen
Iconic Black, White Silver
Z550
Sterling Black, Pearl Copper
SAR EU
Aspen
1.05 W/kg (head)
Z550
1.24 W/kg (head)
Price
Aspen
About 70 EUR
Z550
About 110 EUR