Curve has a camera and more memory. 96mb for curve and 64 for the WE. The WE is slightly larger than the curve. Also the WE will work on Dual-band 900/1800 Mhz GSM/GPRS networks
Please do not buy a 8830! Time out on this question. You should be asking 8330 vs 9630. Which can be found in the 9630 Tour threads. Due out next month.
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The keyboard is also easier to type on with the 8330. The 8830 keys are bigger, but they are also close together, making it easy to press adjacent keys when typing.
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