I respectfully disagree..
4c is "cloud enhanced". Of course they haven't yet provided the deets but I read that to be designed for specific, repetitive tasks requiring less clock and power per thread.
"Density optimized cache" ie..stacked and power enhancements are stated as 4c features but who knows..
They don't have a big/small, big/little, big/bigger arrangement taped yet and we won't see it in Zen4, 4c, 4xxx.
They are, quite simply, using an updated scheduler and fancy up or down-clocking to execute threads more efficiently. Pretty slick as an interim response to Intel plans.