I think the biggest difference between mini flashes and flash triggers lies in the recycling speed and the number of flashes. Any flash used for photography, regardless of its compact size, has relatively high power output. This results in slower recycling speeds that prevent continuous shooting and a limited number of flashes.
From Detroit, Michigan 10-year diving veteran • Underwater photography enthusiast Main Camera: Sony a7 III Lighting: Sea&Sea underwater strobe New Addition: DJI Osmo Action 5 Pro (specializing in underwater videography)