Interesting, I wonder if this has to do with the ongoing lawsuit and is an attempt to pre-empt the next iPhone launch? With the Galaxy S series rapidly becoming the flagship Android handset around the world and in light of this lawsuit I know competition between the two is really heating up, so it very well could be related. But I wonder how much benefit this would have? I know Samsung makes both the Exynos and the A5, but for some reason they chose to use the Mali 400 gpu in their own chip, which seems to be well behind the PowerVR SGX543 the A5 uses. Not quite sure why they did this, unless it has something to do with how many shares Apple and Intel both have in ImagTech.
But anyway, the application processor cores themselves are very similar Cortex-A9 reference designs. I'm not sure what, if any differences there are in memory bandwidth or the type or amount of RAM actually used. Yet the weak point for Samsung is the gpu, not the cpu, so I don't see how increasing the clock speed from the already fast 1.2 ghz to 1.4 really makes up for any deficiency there. And Apple is always gonna have better battery life, due to having one type of hardware and one type of software being built hand-in-hand with each other from the beginning, and I would think this would hurt Samsung's battery life a little more, unless the Exynos as is still has some room to be undervolted a bit.
All I can figure is that maybe Apple plans on using the SGX543 for some application programming, in more of a GPGPU role, as it would be overkill just for its graphics performance alone. This would be a clear advantage to Apple, as they could code new versions of iOS this way, whereas Samsung has little control over Android, not to mention that we're not likely to see much GPGPU in Android real soon with all these different GPU architectures around. Anyway, an extra jump in clockspeed could boost the Exynos' overall productivity score enough to keep it ahead of the A5 in that respect, allowing the GS2, or at least a version of it, to keep the top phone spot this year.