You have to keep in mind, if they aren’t a UI designer, then aren’t trained to pinpoint they key factors of an interface that make it different. They just know

You have to keep in mind, if they aren’t a UI designer, then aren’t trained to pinpoint they key factors of an interface that make it different. They just know one feels better than the other. IMO this is where UX often goes wrong, many people have a feeling for something but they don’t have the terminology to articulate it, nor the skills to reproduce it another context.