Capital One says it closed Trump Organization accounts over money-laundering concerns

The difference is in how much is in the accounts.

“If you owe the bank $100, that's your problem. If you owe the bank $100 million, that's the bank's problem.” ― J Paul Getty

in eu it is normal for banks to turn down customers who are involved in business not outright illegal but statistically involved in shady businesses triggering banking supervision checks and hassle. These kinds of customers cause more cost that the bank gains from proceedings.

There were no charges, no conviction.

A bank audit determined the accounts had a pattern that might introduce liability for money laundering, so they were asked to bank elsewhere. This is the bank protecting itself from being complicit

If there was a conviction for money laundering, it would have gone very differently