Ok. I haven't used a mixer yet. You tell me there's any easy one, a slow one and a hard one. But is one them better at mixing and making them more private?
Discussion
they are all good, the problem is post-mix utxo management. don't lump several mixed utxos together, don't spend mixed coins with unmixed, don't move all of the utxos at the same time etc - basic sane practices.
usually the slow whirlpool is considered more private, while the super-fast wasabi2.0 has blacklisted utxos and raises some suspicions (but it's just paranoia). none of them has been succesfully unmixed so far, other than the user error post-mix.