Brand Surface vs Build Depth

Presentation Builders split into two layers: the brand surface clients see, and the build depth that actually produces the work. Agencies capture margin by owning the surface while renting the depth. The framework asks one question per tool: if this platform raised prices 40% or went down for a week, what would the client notice? Design Huddle lets agencies rebrand the editor and templates end to end, so the surface is fully owned. Slaide's plain-text deck language and SlideX's local-first MDX files push depth toward the agency, since source files stay portable and editable. VistaCreate and GeneratePPT sit closer to the rented end: useful for fast turnaround, weaker as a moat. Forrester's September 2026 finding that private AI deployments outperform shared public tools for B2B marketing applies directly here. Two agencies generating decks from the same public model on the same prompt produce near-identical output, which erases the differentiation a retainer is supposed to buy.