Tirz has the lower side effects profile, and depending on what you read it's much better at quieting food noise, so might do a better job with her evening sweet tooth? That said, I have a good friend on Tirz who has the same evening snacking issue and she's having a very hard time controlling it in spite of the Tirz.
I'm also older female and I adore Tirz, but if Reta had been available to me back at the beginning? I think I'd have enjoyed it's apparent much faster weight loss. But the RHR issue there still concerns me.