Each of us have our own experience with different brands.
I'm on my second set of Bosch Platinums (standard) now at 204K. Use these in all my cars, including the '95 LT1.
Tried Delco for about 2 weeks some time ago. Got misfire. Learned lesson and returned to the Bosch.
For the life of me I can not understand why some on this site have had bad experiences with Bosch. Have I just been lucky? Of course, then again, I did have probs with Delco and others like them.
At 100K and at 200K those plugs had zero wear and looked like the day I put them in. My import mechanic brother did not believe I had 100K on the last set. He DOES use those as replacements though on all his import work.
2001 SSEi- black; stock 92K
1995 Vette; Competition Yellow; stock; 38K