Epoxy vs Vinylester

[McReef]

In a critical structural application does epoxy hold a clear edge in the category of adhesion?

The application - Construction of an integral bracket which will tie into the existing transom, stringers, and interior hull surfaces.

Let us stipulate for the sake of argument that the resins are properly prepared, the fabric being used is appropriate for the job, the existing structure is fully cured and sound (polyester), and adequate and correct prep work is done prior to application.