Here is a more recent comparison of a Core-M Helix 2 to its predecessor running a pre-Haswell i5 3337U CPU. It was slower on CPU specific tests although quicker on GPU tests.
The first ThinkPad product (Helix 2) to make use of the Intel Core M CPU, and as we’ve already mentioned, it isn’t as fast overall as the original Helix, which featured an Intel Core i5 CPU (3337U).
This was shown in our Blender 3D rendering test, in which the Helix 2 recorded a time of 1min (the original Helix got 45sec). That’s 1sec quicker than the Lenovo Yoga 3 Pro, (Note: Yoga 3 Pro performance lags well behind Llama Mountain) which uses the same Core M CPU model.
Graphics processing was a little different, with the Helix 2 recording slightly better results in 3DMark’s mid-range Cloud Gate test (3418 compared to 2820). (remember this is not Haswell being compared it's Ivy Bridge with HD4000 graphics)
It’s also better than the Yoga 3 Pro
, though that tablet has a much higher screen resolution to drive (3200x1800 for the Yoga 3 compared to 1920x1080 for the Helix 2).
Storage performance was a bit slower, with the 256GB solid state drive recording a sequential read speed of 430 megabytes per second (MBps) in CrystalDiskMark, and a write speed of 244MBps. While it had a different drive, the original Helix got results of 433MBps and 263MBps for reading and writing, respectively
So another disappointing result comparing Core-Ms to i5Us. To be fair, the Core-M should not be compared to the i5U series as Core-M replaces the Y series, not the U series so that's where the comparison should be made. However, Intel opened this line of comparison and did so I think with cooked numbers. i.e. Llama Mountain with its non-production Laboratory grade Heat Sink.
Still looking for the Core-M Haswell U series killer... will the
(Nope, failed) 2015 MacBook do it??? Stay tuned and we will find out.
It appears that the Core-M does out pace the Apple A8X SoC so your Core-M device will still outperform any iPad.