The Nexus Prime is to have the new android OS.
One big difference between that gingerbread, and Froyo is the way it handles the processor.
Though there are devices out there that have multiple cores, gingerbread and froyo are only running those devices on one of them.
The processor makes a big difference once Ice-cream sandwich is released. That is when those Dual core phones really get to shine, especially the OMAP4.
Most people don't know how a processor, RAM, and GPU actually works, but google seems to. That is why they chose the OMAP4.
Be it Tegra2, Qualcom, exynos... all of these are single channel and single tread processors.
Though the quadrant scores may be high, there won't be much of an increase when both cores are utilized since all the processing is passing through a single channel/thread.
OMAP4 utilizes multiple channels/threads directly resulting in faster processing with less of a strain on the CPU, GPU, and RAM. This in retrospect should make the system operate faster, use less battery, and minimize the strain put on the hardware.
Right now, The quadrant scores for the OMAP4, being the way it is is amazing!!!
I say that because gingerbread prevents it from using multiple channels and yet it has quadrant scores at 1Ghz that comes close to that of the 1.2GHz Exynos.
Google is well aware of this and chose the OMAP4 for that reason. they're SoC was brilliantly written, but the basic consumer doesn't realize that.
The 1GHz OMAP4 would be a beast when Ice-cream Sandwich is released, one can only imagine what 1.5GHZ can do.