Hard to say. ION 2 for netbooks has 8 shaders, whereas ION 1 had 16. ION 1 was its own chipset, so it supported 3-4GB of memory, whereas ION 2 is just a GPU and is therefore limited to 2GB by the Intel chipset. ION 1 is DirectX 10, whereas ION 2 is DirectX 10.1, indicating a much newer core architecture.
On paper, it's a mixed bag. If I had to speculate, though, I'd say ION 2 is probably faster.
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On paper, it's a mixed bag. If I had to speculate, though, I'd say ION 2 is probably faster.