What's the difference between ね and な as tag questions? For example: そうですね vs そうだな
Is there any difference in level of politeness? Does one sound more masculine than the other?
Edit: The examples above are pretty vague (or even just plain wrong in terms of actually being tag questions). The more concrete example from Amanda S better illustrates my question: パーティは明日だな? (The party is tomorrow, right?) vs あの子はたけしですね? (That child is Takeshi, right?)