Let's take a closer look at the different types of presentations:
These sound generators in desktop format are super popular among home recorders and studio owners. They're designed to sit comfortably on the desk, right beside the mixing console or home recording unit. All the functions are controlled through knobs and buttons. However, if you're searching for sturdy footswitches to switch sounds during live performances, you might not find them on most of these devices. To optimally use the extensive features of a desktop preamp live, it should definitely have a corresponding footswitch or MIDI connection. But don't worry, most of these devices on offer are well-equipped in that regard!
Most desktop bass multi-effects devices these days rely on digital modeling technology. That's essentially the digital replication of the sound characteristics of real amps and cabinets. And since modeling can do much more than just simulate bass amps and cabinets, these desktop modelers usually come with extensive peripherals like effect and microphone simulations. Sound management (saving sounds) is done through presets/banks, allowing these devices to use their resources optimally.
By the way, manufacturers like Kemper also offer their modelers in a Amp Head format or as a 19" rack unit. It's a super practical and completely road-worthy solution, especially if you're setting up a functional live setup. Plus, having fixed cabling within a single casing minimizes any potential sources of error.