[berberous]

Tornado Cash was sanctioned by OFAC, which makes it illegal for U.S. persons to interact with the relevant contract addresses to the same extent as interacting with North Korea.

SushiSwap is not going to be sanctioned. It's not clear what the U.S. could do to shut it down in the same manner, although of course, they could bring enforcement actions like this one and scare off any U.S. person from working on it.