NAPA has more of a focus on professionals and serious DIYs while Advance and the rest of those places are more DIY, Harry the Homeowner based. A look around the store when you go in confirms this. Parts and supplies in one, - air fresheners, steering wheel covers, single job packs of parts and supplies, accessories, stickers, junk radios and speakers, cheapo tools and crap for people who don't know the difference, etc.

Both have different price/quality points for most items. Sadly, most of it is made by foreign enemies, regardless the old line, quality name brand on the box.

When looking for top shelf, hopefully US or non-CCP made parts, I go to NAPA, even though I have a relationship with the other guys.