>Naomichi Yasuda of Sushi Yusuda, a world renown sushi restaurant in Manhattan, says fresh fish has no flavor. He says the thawed product is better than fresh, and freezes fresh fish as soon as it arrives.
Олсо, double blind trial тут говорит что разницы нет: https://academic.oup.com/cid/article/60/9/e43/405137