The BYD Dolphin Surf is 20K Euros in Belguim. This is the same care as the Atto 1.
Presumably it's European duties designed to drive up the price of cheap Chinese electric vehicles that is the difference.
Apparently the EU has tariffs of up to 36% on Chinese electric vehicles.
My Seal had these duties (presumably) but then a 10k EUR subsidy, which sounds odd to me, but must be some policy legacy code.