Laptop Hybrid SLI

I was looking at the new Dell XPS 13 laptops, and the graphics options are the 9400M G, or the 9500M G. The 9500M has ‘Hybrid SLI’ technology…how does this work with respect to CUDA? I was waiting to get an XPS 1330 until the graphics were updated (for CUDA development), but I’m not sure what to think of this new one.

Should I stick with the 9400M, or upgrade to the 9500M, since I’ll be using this for CUDA programming? Can the “SLI” even be disabled to work with CUDA?