But RK3399 has much better single core performance with the A72 cores (that you can run at 2.2ghz), so if you're not running parallelizable tasks all the time (

But RK3399 has much better single core performance with the A72 cores (that you can run at 2.2ghz), so if you're not running parallelizable tasks all the time (/not looking for a cluster) it's a better chip.