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Are you sure they weren't both -a 0.6? 1.0 tends to cause swirly artifacts, but I don't see that. (Is this a different scan? The colors are different and it looks a little squished horizontally.)

It looks a little funny up close, wit those straight lines near edges.

-a 0.2 -alpha 1 -sigma 1 -gauss 1 -fast -alt (one pass) doesn't do badly. Loses more of the blush than I'd like (would probably do a separate mask pass for that).