Steelheart or Watchful Mistress?

I own both a Curve and a Mature Metal Jail Bird. I really prefer the metal construction over plastic, and the JB’s open structure makes it simple to keep things clean during long-term use. However, I’d also like a more fully enclosed metal option.

For my next purchase, I’m deciding between the Steelworxx Steelheart (which is nearly completely sealed except for a small opening at the tip) or the MM WM, which offers mostly enclosure. Does anyone own both and can share how they compare? How similar are the wearing sensations—are they quite distinct—and which one do you prefer?