LHS vs RHS sampling advantages, sum-to-zero QR based

Hi Ben,

sure the link is here and following posts:

RHS zero-to-sum QR

Meanwhile I’ve tested both and the results look they do the same. The LHS could be used for an internal Stan sampling statement.

I always asked myself, why should somebody use a transformation on the LHS, when it can be done on the RHS? Is there some efficiency bonus?