Are all epoxie paints good epoxie paints?

[SVTatia]

Here is a question for the paint specialists out there:

I will be applying a barrier coat on my Allied Luders 33 and would like to know what are the differences if any among PAINT manufacturers.

Other than the popular marine suppliers such as International, US Paints, Petit, etc there are others with household names such as Sherwin Williams and Benjamin Moore that cost quite a bit less.

If a two-part epoxy paint contains high-solids and is recommended for immersion in fresh and salt water would that automatically classify it as good for barrier coating? Does the mixing ratio matter?

I'll appreciate you feedback.