I feel a split 3-level house has about 95% usage value of a regular 2-floor house .

Ranch is the most spacious. About 105% of the 2-floor.

(By the way, Ranch has the highest expansion potential.)

Condo doesn’t have any space outside the home to dump “junks”, like garage, basement, balcony and backyard, so about 5% of the sqf is occupied by the “junks” (rarely needed stuff)  everyone home has.

All of these examples are the same size, say, 1500 sqf.