All four basically look identical. I dont have any black specks or spots on the ceramic portion that would indicate detonation etc. to me they look normal. I dont have an afr gauge on the ski so this is all i have to indicate if its lean or rich.
For a injected four stroke they don't look to bad. The top picture makes it look rich, while the bottom looks just a tad lean, but efi runs on the lean side. If you can richen it up some, it won't hurt it a bit. How does the exhaust smell ?
Ive got it as rich as it could be with my current injectors and regulator. The top pic looks a little darker just become of the angle i took it. All plugs look basically like the second pic. Rode 43 miles today at 17 psi boost. Zero issues. Ill check plugs again tomorrow b