That's exactly what the FTC did during their trial. The FTC lined up QCOM's competitors and had them testify that QCOM's patents were insignificant/inferior compared to their own patent portfolio. I'm fairly sure that this repertoire was in Apple lawyer's play too.
I can't seem to find an article talking about what you just described. Though I'm not sure what the FTC did even matters since we're talking about Apple, not the FTC.
