this has been the principle difference I've seen between the Lowes and HD here.
At the blue store, I can expect I'm on my own, and never to get any eye contact. I was once talking to a guy at the tile desk about ordering some marble wallboards for a shower (that in itself took forever to pin him down) and mid-discussion he cut me off and said, "sorry, my shift just ended, can you come back tomorrow?" and walked off.
Meanwhile at the orange store, just last weekend I was in the plumbing section digging for a part, and a guy walked up to me and said, "Hey, you look like you're looking for something, can I help?" and when they didn't have it, he went and found out where they were on a pallet, got the forklift, unloaded it and everything right while I waited. Oh and that guy is a retired plumber and actually knows his shit. Has told me before what does and doesn't meet code here etc.
I'd be curious to know what the difference is in how they operate at a corporate level.