Run Attribution IQ with Calculated Metrics in Analysis Workspace
It's not possible to add a Calculated Metric to Attribution IQ panel. Get to know a workaround to compare attribution models in Analysis Workspace.
Open a calculated metrics, click on the gear icon to select the desired attribution model and lookback window. Save the metric with a new name. Add both metrics to the freeform table to compare the dimension values performance agains each model. Add more metrics if necessary.