I know that in term of brand awareness, Samsung Galaxy Tab has a better rank than ViewSonic ViewPad. But in term of price and valued, I think 7 inch ViewSonic ViewPad is the better choice. Think about this, with the cheaper price than Samsung Galaxy Tab Wi-Fi (279 USD vs 349 USD), you can have almost everything plus a 3G service that Galaxy Tab could offers except for the high resolution camera and high resolution screen. Both come with the same OS Froyo and I think both come in a very close size and weight.
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I think low resolution camera on ViewSonic ViewPad doesn’t bother me as much as its screen resolution. Even it is only 7 inch screen tablet but with the resolution of 800×480, I don’t feel ViewSonic ViewPad screen resolution is good enough. Imagine watching HD Youtube with low res LCD, not cool isn’t it ? So here is my suggestion. If you don’t mind about camera and low resolution screen. Go with the 7 inch ViewSonic ViewPad. It’s one of the best valued Android 2.2 in the market now. But if not, Galaxy Tab is also one of the interesting choice too.