What each one assumes about your Saturday
Spacio assumes a supported agent. Someone else set up the account, someone else decided which fields appear on the form, and the CRM the office chose is where the visitor ends up. That is a real advantage when it is true, because you walk into the listing and the tooling is already decided.
FoyerSignIn assumes the opposite. You reserved the date with the seller, you entered the open in the MLS, you bought the sign riders, and you will be the one apologizing on Monday if a visitor never hears back. The product is built to survive that reality: one tablet on the door table, a form a stranger finishes in twenty seconds, and follow up that fires whether or not you remember it.
Where the visitor list goes on Monday
The comparison that matters most is not the sign in screen, it is what happens by Monday morning. A name with no follow up is a name your seller paid four hours of your weekend for and got nothing from. Suite based tools generally hand the visitor to the office CRM and expect the agent to work the record there.
FoyerSignIn treats the handoff as part of the sign in. The three touch buyer sequence starts on its own, the seller report goes out the same evening, and the visitor list stays exportable so you can screen numbers against the Do Not Call registry before you dial anyone who is not a client.
Fair housing at the door table
Both approaches let you collect a name, a phone number, an email, and whether the visitor is working with an agent. The difference is who decides what else appears on the form. A configurable form is a strength for a compliance officer and a hazard for a busy agent who adds a friendly question about schools, kids, or the neighborhood feel.
FoyerSignIn ships the safe form by default and keeps the risky questions off it. If your broker wants extra fields, you add them deliberately rather than inheriting them from an office template you never reviewed.