You can't do the same in Wasabi without being detected because the attack target would have to register their non private input first (out of 150) and the malicious coordinator would have to deny registration from non sybil participants, including the attack target's next input. This allows an attacker coordinator performing a sybil attack to be detected by the target.

A second apprpach is a malicious coordinator that purposely never alllows a round to succeed can passively gather input registrations from multiple unsuccessful rounds in order to try to slowly try to cluster them together. This is somewhat detectable I assume since rounds never actually succeed?