SR Injector Difference (Yelllow Dot vs. Green Dot)

The Purple injectors w/ Green Dots have claw pintle caps
The Purple injectors w/ Yellow Dots have full faced pintle caps
The Red injectors w/ Blue Dots have claw pintle caps.

Other than the Pintle Caps are there any other difference between the two?

http://membersdb.son240sx.ca/images/membersdb/1010_sr_injectors_vs_ka_injectors_top_view.jpg