Most pins - Clover's flower head ones included - come in different thicknesses to address different jobs. A thick pin, meant for heavy fabrics, wouldn't work well on lighter fabrics. The flower head ones are supposed to go through the machine easier, but aren't we all taught that we really shouldn't be sewing over them anyhow? Whatever, lol. For those who like them, just be sure to get the finer ones. But also remember, there are lots of manufacturers of the flower head ones, too.
Another brand I've seen recommended is Iris. I didn't like those at all. Like many things, we've all got our preferences.