CX Economy fare comes with subclass(bucket code) with markups (lite/essential/flex)
usually the lite/essential/flex is under the same subclass if you buy from CX directly.

If you would credit to other airline, the markup won’t help because the accumulation is only determined by the subclass.

Eg: if you fly HKG-PVG in S lite you can get 8 status points in S flex you’ll get 20. If you credit to Iberia you’ll get the same mileage accumulated.

you can regard lite/essential/flex as the additional benefit CX sells, including seat selection, baggage, mileage… etc