Bay Trail-T score @ WebXPRT: 574 +/- 8
Anand iPhone 5S review:
Actual Bay Trail-T score @ SunSpider 1.0: 329.6ms
http://www.youtube.com/watch?v=UXCobb134Vo
That makes (up to 2.4GHz) Bay Trail-T >20% faster than 1.3GHz A7 in the 3 Javascript/HTML5 single-thread benchmarks tested by Anand. If they can run Merrifield above 2GHz coupled with a similar PowerVR Rogue GPU (+competitive power levels) then Intel will offer an interesting A7 alternative to Android phones.
Easily see that intel still has some work to do with software. Nowhere is this more obvious that in the disproportionate scaling between baytrail and ivy bridge HD 4000 where adding 4x the EU and increasing frequency (~20-40%) only increases performance about 2.75-3.2x.
Geekbench numbers are flawed unless you are comparing very similar architectures.
Before declaring defeat for Intel I'll wait to see what A7 power consumption under load is like. I'd hope that the Haswell macbook air demonstrating superior battery life to the iPad 4 has taught the lesson of battery life under extremely light load having no correlation to full load power consumption.
That said, the A7 is definitely a nice design, basically a refinement of the groundwork that they laid with the A6. Which makes sense on such a short development cycle, just make iterative improvements on the design you already have so long as it's a good foundation. Will be quite interesting to see where they go from here - my guess is that the next ~2x CPU performance is just going to be from doubling the number of cores.
Look at the AT battery life tests. There is almost no difference when battery capacities are normalized between the 5 and the 5s.
5c is more efficient and lasts longer despite a smaller battery.
Not really more efficient than 5c.
Quite a bit worse than 5c.
Similar to 5c, 4% larger battery, lasts 13% longer on a more efficient GPU.
Does not really look like the 5s is more efficient than the 5c at low level CPU tasks. GPU is obviously more efficient but the CPU seems to be consuming a bit more power. Bit disappointing considering the move to 64 bit, 28 nm from 32 nm, and a more advanced CPU architecture.
The rest of the phone excluding RAM is very similar.