Amy Winehouse

Electric Generator Science Project: Does the shape of the magnet coils matter?

I’m building a low RPM generator and seen many DYI projects videos online.

I have noticed they mostly use rectangular earth magnets.and use coils that are winded in a rectangular coil shape

I have ROUND earth magnets. Should I wind my coils in a circle shape instead of rectangular shape?

I’m assuming that having the coil match the shape of magnet means a more even magnetic pull on the coil. Am I correct in thinking this?

I guess my basic question is, before I wind all these coils, what shape should I wind my coils when using ROUND earth magnets. Circular or rectangular?

Thanks in advance!