I started out on a petite model and immediately had to start the trade-in process for a non-petite because of the pedal spacing. My feet are too wide for the pedal spacing on all the petite pedal harps. Later when the grand petite came out I was curious and tried it out and it also has the smaller pedal spacing. For people with slim feet they are perfect.
Anyway, I wish someone had told me about the pedal spacing before I bought my first harp. I was new to pedal harp so didn’t know it would be an issue. If I ever buy another pedal harp that will be one of the first things on my list to check.