Folding vs. retractable utility knife - which should I buy?

Across the reviewers we read, folding utility knives (Fiskars Pro, Klein Flickblade, Gerber EAB) tend to be favored for everyday carry because they ride flatter in a pocket and open one-handed. Retractable sliders (WORKPRO, REXBETI) are preferred for repetitive box-cutting and jobsite work because the blade speed is faster and you can park the blade at multiple depths. Tradespeople in r/Tools threads commonly own both.