Ah. If you are testing for purposes of applying to DYS, then I think it does not matter much which one is used, since any one is likely to generate the scores necessary.
I notice, in exploring the DYS eligibility pages, that they have introduced another test option, which is fully remote, for above level-testing on a practice SAT, which appears to include your child's age/grade-level. You might consider that, as a much more affordable and accessible option (cost beside, cognitive and achievement testing by licensed professionals through private, non-school channels can have waitlists on the scale of 6-12 months easily).
If you are attempting to access math beyond univariate calculus, you might also investigate online two- or four-year college courses, even in other states. Depending on your state or region, there may be options. Even if the credits did not end up being transferable, the educational value to the child would remain. Most of the 2-year colleges in our area have math up to at least linear algebra available in online asynchronous formats, and some have differential equations.
