Thanks for confirming there is no difference.
There is clearly a difference between being a scammer, and having your business confiscated. The result to the victims is the same, but there is clearly a difference. I agree that the potential to lose customers' coins is a very high price to pay, and might not worth it. Better use a trustless option, like coinjoin or swap XMR.
It's the same topic because the stored private keys prove ChipMixer was a premeditated scam the entire time.
That is true if ChipMixer had said they weren't keeping the private keys. As far as I can recall, they never argued they were deleting the private keys after the end of the session. They were only deleting the logs:
How long do you keep logs?
Your session lasts for 7 days. After that, your session and all its data will be removed. You can also destroy your session before time is up. We keep statistical data ie. how much was donated.
I do agree that deleting the private keys wasn't good practice.