I hate to get involved in the drama of most threads, but something Les said earlier has vexed me. So much so that I can't keep my mouth shut, though I'm sure that I should and will in fact regret ever getting involved. But...
I do, in a sense, find "tactical" to be a marketing term, when employed by a reseller or someone involved in the marketing of a knife, but from a knife making standpoint I find it to be a term used by the maker to describe intended function. In fact, of all the other categories Les has mentioned, "tactical" is the only one that does not describe the appearance of something by definition. Any essentially "tactical" knife, a Strider SMF for example, can be taken by the maker and dressed up with various materials and finishes to produce a more visually appealing and perhaps higher performance version of the same exact initial design. I do not feel that that would change the originally intended intrinsic function of the knife. "A rose by any other name is still a rose" comes to mind. I really would not call the Sebenza a "tactical" folder, but according to your definition...
And secondly, why is it that an "art" folder, by previously stated definition, can not utilize synthetics or matte finishes in its construction and design? That's akin to comparing Salvator Dali to Jackson Pollock. Because there is no true subject matter, does that mean that Jackson Pollock's work is any less "art" than Dali's? Of course the answer to that is entirely subjective, much like the term "art" itself.
Alas, I digress. Back to the scheduled programming. And speaking of Strider...
Hey, if I didn't know any better, I'd say those might be art folders!