Why has data transfer not improved when using FVector_NetQuantize?

I am sending this structure using an RPC:

USTRUCT()
struct FCustomTransform
{
	GENERATED_BODY()

	UPROPERTY()
	FVector_NetQuantize100 Location = FVector_NetQuantize100();

   //Using FVector_NetQuantize100 instead of FRotator
	UPROPERTY() 
	FVector_NetQuantize100 Rotation = FVector_NetQuantize100(); 
};

When I was sending FRotator 300 bits were transferred.
Using FVector_NetQuantize100 also transfers 300 bits.
There is not difference or improvement.

I am passing the data as a parameter in an RPC function

UFUNCTION(NetMulticast,Unreliable)
void Execute_MultiShoot(const FCustomTransform &MuzzleTransform, const FCustomTransform &ProjectileTransform, const ENetRole CurrentRole);

RPCs send more data than function parameters?
How can this be improved?

Thank you so much!!


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