Whirlpool: ~5% once + mining fees (remixes free -> much higher privacy set over time)
WabiSabi: 0% + mining fees
JoinMarket: 0.01-0.03% per round (as Taker) + FULL transactions mining fees every time
The "ridiculously low 0.001%" is not real and what is misleading here. You pay 0.01-0.03% and that repeatedly + the FULL miner fees, which is why JoinMarket usually ends up more expensive overall.
