One thing that makes cartoon people drawings easy is avoiding too much detail. Keeping the features basic and exaggerating certain aspects, like big eyes or a big smile, can make it simpler. Also, having a consistent style throughout helps.
The main difference is usually in the style. Horse cartoons might focus more on character expressions and cuteness, while comic strips might have a stronger storyline and more complex panel arrangements.
A pie eyed cartoon is appealing because the exaggerated eye size creates a sense of expressiveness. It allows the characters to convey emotions more vividly. Also, the simplicity of the style can be visually appealing and easy to remember.