Soft doubling and the effect on SCORE / Sharpe ratio

I believe that Don mentioned in BJA3 that ignoring soft doubling rules really doesn't hurt your expected return very much.  It occurred to me that soft doubling probably increases your volatility and therefore may hurt your SCORE / Sharpe ratio.

So if I ignore soft doubling, does my SCORE go up or down?

Same question for always taking "even money" when I'm dealt a blackjack and the dealer is showing an Ace.