Phillips P2 and Posidrive

I noticed they now label "Phillips" screwdriver bits as "P2" and "P2 reduced".
I noitice the head on the P2 is smaller.
WHO uses P2 "reduced" - looks like sheetrocker thing ?
I use them interchangeably.
WHY do we need 2 Phillips heads of number 2 size ?
++++++++++++++++
WHO uses POSIDRIVE ?
I was in Home Depot tool corral, and they don't even have it anywhere.
I would have to go to the Woodworker Store.
Most people including myself use a Phillips screwdriver.
Seems to work but WHY was Posidrive invented ?
Better to use the correct posidrive bit - less cam out ???
TIA
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.