Intel doesn't power gate functional blocks within the core and it's not possible to even do it in any reasonable way because of the latencies required.No. ARM took a pass on power gating (to the extent that Intel pushes it) and just went big.LITTLE. Intel tries to have one core (or a small set of cores) in their low-power chips scale from boosted 3 GHz+ states chewing up higher-than-TDP power ratings to ultra-low clockspeeds with sub-4.5W power usage. And to their credit, it almost worked. But they have never been able to make Core suitable for tablets or phones, and it will never work. Atom didn't work out there either, nor will it ever. Which is why they punted on those markets, at least for awhile.
Lakefield may (eventually) change that.
If you're referring to core power gating, Arm cores also have considerable advantages to Intel's cores.