General Which one should I get?

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http://androidforums.com – I know this is the "galaxy" section of the site, But I want you to help me with the other two, the s and the one. I'm in the market for my FIRST android phone, I'm not really newbie and don't know how a phone works, So I should be able to operate it fine. I'm going to get either the nexus one or the nexus s. Note- I will only be using wifi on them, no data plan. When I watch comparisons, or whats better about the nexus s, 80% of it has to do with the OS. When the comparisons were made the s had gingerbread and the one didn't, So they made the s seem all better just because it had (General)