This is kind of a strange comparison. Although the two shows are SOMEWHAT similar...
"Parker Lewis" was more or less supposed to be an off-shoot of Ferris Bueller (completely unrelated, just roughly based on a similar storyline).
Around the same time, NBC came out with "Ferris Bueller". That only lasted around 13-weeks, and then quickly got canceled while Parker Lewis lived on for 3-full seasons (either because Fox just was desperate for any shows it could keep, or it was getting decent ratings... I don't know).