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As most of us have known ipod well, there is no need to say more. But what is Zune?
According to Chris Stephenson, Microsoft General Manager of Marketing for the MSN Entertainment Business, Zune is an umbrella brand for what he says is "a family of hardware and software products" targeting various digital entertainment services.
The first implementation of this will be the portable music player and digital music service.
Additional Zune-branded devices will follow, including a portable video player and, potentially, a portable game device, although Stephenson would not comment on the videogame element of the initiative.
At the same time, a lot of companies have developed some products for Zune.
Now I'll list some key differences between Zune and ipod.
Here are some comparisons between ipod and Zune.

Price:
80gb Zune:$249 80gb iPod:$249 4/8 gb Zune:$149 / $179 4/8 gb Nano:$149 / $199
Storage:
80gb Zune:80 GB 80gb iPod:80 GB 4/8 gb Zune:4gb / 8gb 4/8 gb Nano:4gb / 8gb
Wi-Fi:
80gb Zune:YES 80gb iPod:none 4/8 gb Zune:YES 4/8 gb Nano:none
WirelessFileSharing
80gb Zune:YES 80gb iPod:none 4/8 gb Zune:YES 4/8 gb Nano:none
Wireless Sync
80gb Zune:YES 80gb iPod:none 4/8 gb Zune:YES 4/8 gb Nano:none
Landscape Mode
80gb Zune:YES 80gb iPod:none 4/8 gb Zune:YES 4/8 gb Nano:none
Portrait Mode
80gb Zune:YES 80gb iPod:YES 4/8 gb Zune:YES 4/8 gb Nano:YES
FM Tuner:
80gb Zune:YES 80gb iPod:none 4/8 gb Zune:YES 4/8 gb Nano:none
Preloaded Audio:
80gb Zune:YES 80gb iPod:none 4/8 gb Zune:YES 4/8 gb Nano:none
Preloaded Video:
80gb Zune:YES 80gb iPod:none 4/8 gb Zune:YES 4/8 gb Nano:none
Max Battery Life:
80gb Zune:30hr 80gb iPod:30 hr 4/8 gb Zune:24 hr 4/8 gb Nano:24hr
Preloaded Virus:
80gb Zune:none 80gb iPod:RavMonE-6.0.exe 4/8 gb Zune:none 4/8 gb Nano:RavMonE-6.0.exe
CustomBackground:
80gb Zune:YES 80gb iPod:none 4/8 gb Zune:YES 4/8 gb Nano:none
Manufacturer:
80gb Zune:Flextronics 80gb iPod:Foxconn 4/8 gb Zune:Flextronics 4/8 gb Nano:Foxconn
Screen Size:
80gb Zune:3.2" 80gb iPod:2.5" 4/8 gb Zune:1.8" 4/8 gb Nano:2.0"
LCD Resolution:
80gb Zune:320x240 80gb iPod:320x240 4/8 gb Zune:320x240 4/8 gb Nano:320x240
Video out (TV):
80gb Zune:720x576 80gb iPod:640x480 4/8 gb Zune:none 4/8 gb Nano:640x480
USB:
80gb Zune:2.0 80gb iPod:2.0 4/8 gb Zune:2.0 4/8 gb Nano:2.0
Colors:
80gb Zune:Black 80gb iPod:White,Black 4/8 gb Zune:Pink,red,green 4/8 gb Nano:blackSilver(4GB),White,teal,green,black,red (8GB)
Click Wheel:
80gb Zune:none 80gb iPod:YES 4/8 gb Zune:none 4/8 gb Nano:YES
Tactile + Touch Ctl:
80gb Zune:YES 80gb iPod:none 4/8 gb Zune:YES 4/8 gb Nano:none
Online Service:
80gb Zune:ZuneMarketplace 80gb iPod:iTunes 4/8 gb Zune:ZuneMarketplace 4/8 gb Nano:iTunes
UnltdDownloads:
80gb Zune:$14.99/month 80gb iPod:none 4/8 gb Zune:$14.99/month 4/8 gb Nano:none
Podcast Service:
80gb Zune:YES 80gb iPod:YES 4/8 gb Zune:YES 4/8 gb Nano:YES
Battery:
80gb Zune:Li-Ion 80gb iPod:Li-Ion 4/8 gb Zune:Li-Ion 4/8 gb Nano:Li-Ion
XBOX Marketplace:
80gb Zune:YES 80gb iPod:none 4/8 gb Zune:YES 4/8 gb Nano:none
Unique Online Card:
80gb Zune:Zune Card 80gb iPod:none 4/8 gb Zune:Zune Card 4/8 gb Nano:none
3rdPartyAccessories:
80gb Zune:YES 80gb iPod:YES 4/8 gb Zune:YES 4/8 gb Nano:YES
Social Networking:
80gb Zune:YES 80gb iPod:none 4/8 gb Zune:YES 4/8 gb Nano:none
Weight:
80gb Zune:4.5 ounces 80gb iPod:4.9 ounces 4/8 gb Zune:1.7 ounces 4/8 gb Nano:1.74 ounces
Width:
80gb Zune:2.4" 80gb iPod:2.4" 4/8 gb Zune:1.6" 4/8 gb Nano:3.6"
Height:
80gb Zune:4.25" 80gb iPod:4.1" 4/8 gb Zune:3.6" 4/8 gb Nano:2.75"
Thickness:
80gb Zune:0.5" 80gb iPod:0.43" 4/8 gb Zune:.33 4/8 gb Nano:.26
Tattoo Freak:
80gb Zune:MSzunefan 80gb iPod:none 4/8 gb Zune:MSzunefan 4/8 gb Nano:none
User Forum:
80gb Zune:Zune Scene 80gb iPod:iLounge 4/8 gb Zune:Zune Scene 4/8 gb Nano:iLounge
Compatibility:
80gb Zune:PC 80gb iPod:Mac, PC 4/8 gb Zune:PC 4/8 gb Nano:Mac, PC
ReplaceableBattery:
80gb Zune:NO 80gb iPod:NO 4/8 gb Zune:NO 4/8 gb Nano:NO
User made games:
80gb Zune:XNA toolkit 80gb iPod:none 4/8 gb Zune:XNA toolkit 4/8 gb Nano:none
Special Edition:
80gb Zune:Zune Originals 80gb iPod:tbd 4/8 gb Zune:tbd 4/8 gb Nano:tbd
Vendor:
80gb Zune:Microsoft 80gb iPod:Apple 4/8 gb Zune:Microsoft 4/8 gb Nano:Apple
Headphones:
80gb Zune:PremiumEarphone 80gb iPod:earbud 4/8 gb Zune:earbud 4/8 gb Nano:earbud

Format Support:
Zune support MP3,Zune Marketplace(Protected),AAC,WMA,JPEG(Photos),WMV(Videos),MPEG-4(Videos),H.264(Video).
IPod support iTunes(Protected),AAC,AIFF,WAV(Uncompressed),.aa,JPEG(Photos),BMP(Photos),MPEG-4(Videos),H.264(Video).

FM Radio:
Zune has a built-in FM tuner. But if you want to listen to radio on iPod, you have to buy an accessory.

Battery:
The battery Life of Zune is reported to be up to 13 hours, when listening to music with the wireless turned on. With the wireless off, battery life is up to 14 hours and up to approximately 4 hours for video or pictures, all of which is similar to earlier rumors and informal comments. However, some folks think the testing conditions are wildly unrealistic.
By comparison, Apple's 30GB iPod is rated at 14/4 hours (music/video) and the 80GB iPod at 20/6 hours.

You can find other differences from the illustrations I posted or more iPod and Zune comparison information.

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