The comparison is only valid if both figures use the same measurement standard and an independently accredited laboratory. DS,A under ISO 23351-1, tested by an independent accredited laboratory, is the verifiable basis for comparison. Marketing figures cited without reference to ISO 23351-1 or an independent laboratory may use different measurement methods or conditions that produce higher-looking numbers not directly comparable to independently verified DS,A. Always request the specific DS,A figure under ISO 23351-1 from a named accredited laboratory before comparing acoustic performance.