What makes a foil more or less stable in the roll plane - ie easier to turn but less stable and visa versa (harder to turn but more stable) ?

Some front wings have really funky curves with most having down turned windtips while some like the Zeeko Carver are almost flat from wing tip to wing tip ??

If I want something looser (or more stable on the other side of the question) is the shape of the front wing going to give me a clue ? Im very new to this foiling thing but can now ride in both directions but am interested in what front wings and their shape (not so much the low or high aspect stuff) does for manourvability ??