what type GPU is better for SoW_BoB?

[Flyby]

I've just read an interesting review of ATi's new 4870-1gb gpu. It's a good value in that it only costs about $24.00 USD more than the 4870-512mb card. It was compared to the new GTX260+12 gpu, which has 12more stream processors enabled versus the standard GTX260. In the conclusion of the article I was made to wonder if Sow_BoB would be considered more of a shader-intensive sim or a memory sensitive sim. So I thought I'd ask here for any speculations as to which might be the more appropriate card for SoW: ATi 4870-1gb or the GTX 260+12?
here's a link to the article: http://enthusiast.hardocp.com/articl...50aHVzaWFzdA==
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