Two versions of the same knife, same blade, same weight, forty-three dollars apart. The Kizer Microlith comes in carbon fiber at $104.30 and in titanium at $147, and the question worth answering is what that $42.70 actually buys.
The Ki2533A1: 6 inches overall, 2.375-inch CPM-S35VN drop point at 0.12 inch stock, bead blast finish, 3.5-inch titanium handle, 2.73 ounces. Deployment is a flipper tab plus a thumb slot, the pivot runs on caged bearings, and the clip is a 3D-milled titanium piece, tip-up. Nick Swan designed it. Kizer's own copy is unusually candid about the engineering: there is no steel liner at all on the non-locking side, which is how a titanium frame gets down to the same weight as the carbon fiber version.
That detail matters more than it sounds. Most liner-lock knives are two steel liners with plastic or composite slabs bolted on either side, so the weight of the lock and the weight of the structure are separate problems. The Microlith collapses them: one titanium slab is the handle, the frame and the spring, and the show side is a bare plate. Fewer parts, fewer screws, nothing to work loose. It also means the knife is essentially monolithic in the hand, with no flex and no rattle, and it means the whole thing is a single temperature when you pick it up in winter.
What you give up for the titanium is texture. Carbon fiber has a slight tooth to it and damps the snap of the flip; bead-blasted titanium is slick and rings. On a 2.375-inch knife that lives loose in a pocket, slick matters. Neither version has jimping worth mentioning on the spine, and the handle is 3.5 inches, which is a three-finger grip for most hands.
Against Kizer's other small S35VN option, the Mini Sheepdog C01C at $169, the Microlith is the tool and the Sheepdog is the toy. Against the $41.30 Begleiter you are paying three and a half times as much for a knife half the size, which only makes sense if pocket space is the constraint.
Verdict: take the titanium if you want the nicer object and do not mind a slick handle; take the carbon fiber if you want the better value. Mechanically they are the same knife, and both are slicers with a 0.12-inch stock blade, not pry bars.
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