I have both micarta and stainless plain-edge Calypsos.
While the flat grind of the micarta model slices apples, cheese and bread far better than the other, that's about the extent of it's use due to it's more fragile construction.
The stainless model cuts everything else far better.
I also like the way it fits my hand without the clip.
My stainless model, clipless of course, is one of the most attractive Spydercos I own.
I wear it in a ballistic nylon sheath vertically on my belt. It's thin profile (1/2", inc. sheath) does not snag clothing and is close to my body.
The heft, feel, sound and appearance of the stainless model provides me with an impression of FAR greater strength than the micarta model.
Accordingly, I like it best.
Bill