The outward difference is that a Pozi screw head has 4 small lines bisecting the "cross".(see picture)
Dome Head with square under
the head to locate and hold when tightening.
Cheese heads are round, like
a full cheese usually slotted.
#### Flanged have a small lip, like a built in washer, around the base of the head.
different types of head are flanged, i.e pan head flanged, button head flanged, cheese head flanged, etc