fz21s or fz31s?

hi, I am in between 2 laptops of fz series:Which one you think is better?They look the same to me...


Platform Intel® Centrino® Duo processor Technology
Chipset Mobile Intel® PM965 Express Chipset
Microprocessor Full Name Intel® Core™ 2 Duo Processor T7500, Supports Enhanced Intel SpeedStep®
Microprocessor Speed (GHz) 2.2
L2 Cache (KB) 4096 Advanced Smart Cache
Frontside Bus (MHz) 800
Number of Cores 2
Memory Speed (MHz) 667
Memory Type DDR2 SDRAM (2x1024MB)
Max. Memory (MB) 4098
Max Memory Comment In the case of 4GB, a portion of the system memory over 3GB might not be available to the operating system
Memory Size (MB) 2048
Optical Drive Type Blu-ray Disc™ Combo Drive: BD ROM/ DVD+-RW/+-R DL/RAM Drive
Hard Drive Capacity (GB) 200
Hard Drive Speed (rpm) 5400
Optical Drive Fitting Built-in
Hard Drive Type Serial ATA
Write CD-R x24, CD-RW x16, DVD-R DL x4, DVD-R x8, DVD-RW x6, DVD+R DL x4, DVD+R x8, DVD+RW x8 , DVD-RAM x5
Read CD x24, CD-R x24, CD-RW x24, DVD x8, DVD-R DL x6, DVD-R x8, DVD-RW x6, DVD+R DL x8, DVD+R x8, DVD+RW x8, DVD-RAM x5, BD-ROM x2, BD-Rx2, BD-RE x2, BD-RE DL x1.6, BD-R DL x1.6
Display
Display Type X-black LCD with double lamp technology
Diagonal Size (in) 15.4
Resolution Format 1280 x 800
Resolution Type WXGA
Graphic Card Full Name NVIDIA® GeForce® 8600M GS
Producer NVIDIA®
Comments Total Available Graphics Memory of 1023MB and dedicated Video Memory of 256MB
Interfaces
4 Pin i.LINK™ (IEEE1394), 400 Mbps 1
DC in 1
Memory Stick™ Slot 1
Memory Stick Slot Type Memory Stick™ Std / Duo, Memory Stick™ PRO Std / Duo, high speed data transfer
SD Card Slot 1
Microphone Jack 1
RJ-11 Direct Port (Modem) 1
RJ-45 Direct Port (Network) 1
USB Speed High/Full/Low
USB Port (quantity) 3
USB Version 2.0
USB Connector Type A
VGA Connector for Monitor 1
TV out 2
TV out type S-Video + HDMI
Audio out 1
Express Card Slot Type 34mm
Audio out Type(s) Stereo Headphones/Speakers Jack
Express Card Slot 1
Connectivity
Built-in Modem V92/V.90
Integrated Wireless LAN YES
Wireless LAN Max. Date Rate (Mbps) 300
Wireless LAN Range (m) max. 100
Integrated Bluetooth (Version) 2.0 + EDR
Bluetooth Range (m) 10
Wireless LAN Type 802.11a/b/g/Draft n
Ethernet network 100 BASE-TX/10 BASE-T
Motion Pictures max. Resolution (pixels) 1280x1024 (SXGA)

0R


Platform Intel® Centrino® Duo processor Technology
Chipset Mobile Intel® PM965 Express Chipset
Microprocessor Full Name Intel® Core™2 Duo Processor T8100, Supports Enhanced Intel SpeedStep®
Microprocessor Speed (GHz) 2.1
L2 Cache (KB) 3072 Advanced Smart Cache
Frontside Bus (MHz) 800
Number of Cores 2
Memory Speed (MHz) 667
Memory Type DDR2 SDRAM (2x1024MB)
Max. Memory (MB) 4096
Max Memory Comment In the case of 4GB, a portion of the system memory over 3GB might not be available to the operating system
Memory Size (MB) 2048
Optical Drive Type Blu-ray Disc™ Drive: BD-R/-RE/-ROM/ DVD+-RW/+-R DL/RAM Drive
Hard Drive Capacity (GB) 250
Hard Drive Speed (rpm) 5400
Optical Drive Fitting Built-in
Hard Drive Type Serial ATA
Write CD-R x8, CD-RW x8, DVD-R DL x2, DVD-R x8, DVD-RW x2.4, DVD+R DL x4, DVD+R x8, DVD+RW x4 , DVD-RAM x5, BD-Rx2, BD-RE x2, BD-R DL x1, BD-RE DL x1
Read CD-ROM x24, CD-R x24, CD-RW x24, DVD x8, DVD-R DL x6, DVD-R x8, DVD-RW x6, DVD+R DL x8, DVD+R x8, DVD+RW x8, DVD-RAM x5, BD-ROM x2, BD-Rx2, BD-RE x2, BD-RE DL x1.6, BD-R DL x1.6
Display Type X-black LCD with double lamp technology
Diagonal Size (in) 15.4
Resolution Format 1280 x 800
Resolution Type WXGA
Graphic Card Full Name NVIDIA® GeForce® 8600M GS GPU
Producer NVIDIA®
Comments Total Available Graphics Memory of 1023MB and dedicated Video Memory of 256MB
Interfaces
4 Pin i.LINK™ (IEEE1394), 400 Mbps 1
DC in 1
Memory Stick™ Slot 1
Memory Stick Slot Type Memory Stick™ Std / Duo, Memory Stick™ PRO Std / Duo, high speed data transfer
SD Card Slot 1
Microphone Jack 1
RJ-11 Direct Port (Modem) 1
RJ-45 Direct Port (Network) 1
USB Speed High/Full/Low
USB Port (quantity) 3
USB Version 2.0
USB Connector Type A
VGA Connector for Monitor 1
TV out 2
TV out type S-Video + HDMI
Audio out 1
Audio out Type(s) Stereo Headphones/Speakers Jack
Express Card Slot 1
Express Card Slot Type 34mm
Connectivity
Built-in Modem V92/V.90
Integrated Wireless LAN YES
Wireless LAN Max. Date Rate (Mbps) 300
Wireless LAN Range (m) max. 100
Wireless LAN Type 802.11a/b/g/Draft n
Integrated Bluetooth (Version) 2.0 + EDR
Bluetooth Range (m) 10
Ethernet network 100 BASE-TX/10 BASE-T
Motion Pictures max. Resolution (pixels) 1280x1024 (SXGA)

 

They're pretty similar right enough.
But looks like the FZ31s has a Blu-ray burner whereas the FZ21s only has a ROM. The 31s has a slightly bigger hard drive. It also has the T8100 vs the T7500. This thread discusses the two processors:
http://forum.notebookreview.com/showthread.php?t=213507
Prob other differences too I'm not spotting.

 

i have the FZ21S...its a gret laptop, but obviously 31s is an upgrade, so go for it.

Although i do notice the 21s has more L2 CACHE memory. 4mb rather than 3.
But id rather have the blu-ray burner than the ROM. and the faster penryn chip.

Damn if i waited 5months!

 

Thank you very much for your replies will probably go for the 31s, probably the blu ray will take on dvds in a few months and a blu ray writer would be a smart choice.