That's a little unfair, the RISC-V design is intended for both low power and high power applications, in implementation is has the potential to be comparable to

That's a little unfair, the RISC-V design is intended for both low power and high power applications, in implementation is has the potential to be comparable to the Pi 3's Cortex-A53. Where as the two 86s you mention are very old slow CPUs and the other two you mentioned are 8bit microcontrollers.