Do reporting options for the focal financial plan version determine comparison plan values?

Yes. Reporting options for the focal version also apply to comparison plan versions.

For example, if you select raw cost as the reporting cost, then margin analysis is performed using raw cost for both the focal version and the comparison versions.

Let's take another example where the focal version is created using a financial plan type where cost and revenue are planned using the same version. Here the focal version contains a single quantity and that's used for comparison. If a comparison plan is based on a financial plan type where cost and revenue are planned using separate versions, then the reporting options (report quantity) for the focal version determines whether quantity from the cost or the revenue version is used to calculate variance.

Note: At the financial plan type level, report quantity is always cost quantity when planning for cost and revenue on the same version. However, when reviewing budget or forecast versions, you can edit reporting options to use quantity from the revenue version of the comparison plan.