I'm not 100% sure what the implication here is about slightly thinner wire, but I thought I'd add a few points:
We've worked really hard to find the best vendors for the wire we use and at this point we've been using the same vendors for decades.
When we order wire we do it based on gauges, which are standardized across the industry. We also inspect 100% of the wire we use for consistency.
When we build pickups we don't wind to a DCR spec but rather to a number of turns, and there are several factors that can affect a DCR reading, including ambient temperature when the reading is taken, which means you can end up seeing some variety in readings for the same pickup model.
Hope that helps!