Because uncle Claymore have a premium quality stamp and JCE CPU is not.
1. Claymore's CPU miner do not hurting ryzens (58 C)
2. Claymore's CPU miner have a highest hs. (Ryzen 7 2700 - 680 hs at the same time with 6 GPU mining)

Any other CPU miner can do same??

Claymore, please, give back dev fee and update us.