Technical question??

[Maine Sail]

I am trying to find out what the PSI peel strength is for fiberglass when using polyester resin vs. epoxy resin in the following situations.

#1 PSI shear/peel strength for secondary bond of polyester resin and cloth to older polyester GRP hull.

#2 Primary PSI strengths for polyester resin / fiberglass vs. epoxy/fiberglass.

I have read that Vinylester resin has a roughly 500 PSI bond strength and epoxy is, and can be, over 2000 PSI. I know polyester is less strong than vinylester but how much less is it 200 PSI? 300 PSI?? 400 PSI??