Ugh, forget this example, in this case we know the original tuples, so == is simpler and cleaner.

Another interesting thing to test is if one typetuple can be converted into another.
Maybe like this:

bool compatibleTypeTuples(TT...) {
    TT[0..$/2] tt1;
    TT[$/2..$] tt2;
    static if (__traits(compiles, tt1 = tt2))
        return true;
    else
        return false;
}