First, you have to pay a tx0 to enter to whirlpool. You are gonna mix with a lot of users getting no clue because high anon set. You can check here:
https://bitcoinmagazine.com/technical/how-bitcoin-anonymity-sets-work
In wasabi you can have 20 open wallets mixing with less than 1 million sats in each one without pay coordinator fees. A Sybil attack can be possible in Wasabi.
You blend in with far fewer potential input and output addresses from a Whirlpool coinjoin than even a minimum sized Wasabi coinjoin. Take this transaction for example: https://mempool.space/tx/0d832b9db303d4f5934c52a061af9c3c378f0243f8cbb8783d14a1d52e8cbdbb
-138/145 unique input addresses were from outputs getting remixed from 68 previous coinjoin rounds. An observer of an output in this coinjoin would have a choice of 13,615 inputs within two hops.
-150/166 outputs became inputs for 60 future coinjoin rounds. An observer of an input in this coinjoin would have a choice of 14,528 outputs within two hops.
By comparison, observers of a Whirlpool output would have a choice between 17 inputs within two hops. Observers of a Whirlpool input would have a choice between 25 outputs within 2 hops (in the best case scenario).
