https://youtu.be/lqxVCzYlDCA10400 is:
1080p high gaming: 0-14% faster
R20 - 9% slower multicore, 13% slower single core
power consumption: 4W less at R20 and 11W less at gaming
max temperature: 18C cooler
cost @ newegg: $22 more (10400f expected to be cheaper)