Comparing China domestic-spec and export-spec cars means re-verifying against the exact version. If market access, emissions and safety equipment, the infotainment language and network features, or the charging interface, warranty and parts rely on generic material, the conclusion can't be trusted. Compare the domestic and export configuration sheets for the same model across emissions, safety, infotainment, charging and warranty, and carry the differences into the quotation and delivery notes. The person in charge logs the market access, emissions and safety equipment first, then verifies the infotainment language and network features. If the charging interface, warranty or parts change, the earlier conclusion no longer stands. When finished, have the person responsible for China domestic vs export spec cars sign off, record the date of the documents used, and note any exceptions that must be cleared before the next step.
For version differences, see also How should importers compare two Chinese cars when both have similar prices?. Where China domestic vs export spec cars involve import licensing or market access, the written conclusions of the destination country's competent authority and licensed agent at the time of processing take precedence.