The real gap is software, not the number of pedals.
One app controls everything, or nothing needs to run at all
The Stream Deck Pedal only does something while the Stream Deck
app is open: its three pedals hold whatever action, plugin, or
multi-step macro you assigned in that app, and can change
automatically when you switch which game or program has focus.
The PCsensor pedal is programmed once through its FootSwitch
utility. After setup, it behaves like a plain USB keyboard,
with nothing to keep running in the background.
Plugins turn a keystroke into an action
Elgato's plugin catalog covers OBS, Twitch, YouTube, Discord,
Spotify, and Philips Hue, so a single pedal tap can trigger a
multi-step action, not just one key. PCsensor's pedal has no
plugin layer: each press is one keyboard, mouse, or media-key
output, mapped directly, with no conditional logic.
Pedal feel is adjustable on one, fixed on the other
Elgato ships four soft, four medium, and four hard springs plus
two stoppers so you can set how much pressure each pedal needs
before it fires; a buyer reviewing the Elgato pedal specifically
credited the added weight and adjustable tension with keeping it
from sliding on carpet. PCsensor's photoelectric switches are
quiet and shaftless but not spring-adjustable, and several
buyers describe the lighter chassis sliding on hard flooring,
which matters for players who use a foot control during
combat in an MMO like the setups covered in the
OSRS setup hub.