I was not aware of the 10% base duty for all cars into EU.
But the rates you state are general for a brand, but do not account for per model negotiations:

https://www.reuters.com/world/china/eu-tariffs-imports-china-made-evs-2026-02-11/

Carmakers can now negotiate tariff exemptions for individual electric models imported from China.

Cupra Tavascan has achieved a 0% duty, and Tesla is 7.8%.
I suspect several of the more popular Chinese models, have negotiated lower rates too.