Hi Justin42284,
So called “soy based” foam is just another form of polyfoam and it’s quality/durability depends on it’s density and other properties just like any other polyfoam (and can be directly compared to any other polyfoam). You can read a little more about polyfoam that has replaced some of the petrochemical polyols with polyols that are chemically derived from plant oils such as soy in post #2 here.
They are directly comparable to other forms of polyfoam with a similar density and similar performance specs.
Phoenix