[Christ]

Bosch Platinums are exactly the same as other plugs for electrode design.

Platinum +2 are what you have, and they're cut back so the flame kernel propagates to the center of the electrodes.

Platinum +4 are what you've pictured here, same idea.

Platinum +2 and +4 plugs have been shown (somewhere) to increase spark advance due to lower signal latency (I believe that's the correct term). In some people's engines, this has caused problems, and in severe cases, engine failure.

Best to check and adjust, if you have a way to adjust for it. Might even get an extra .00002 MPG out of it. LOL.