Good question. I do not read or have national knowledge or really any regional knowledge. Locally Walmart has 3 stores within 5 miles of varying sizes - square footage, product depth, and product type, e.g. grocery.
Target has one in that same range of driving. The Target here just last year reorganized the interior square footage to include grocery. Something was obviously taken away or given less square footage to do that. Seems an overall product availability to compete with Walmart with an emphasis of convenience to shoppers or clientele.
With the Walmart stores one is at the border of two city / town regions. I live in what is called North County of San Diego County in Escondido. The San Marcos / Escondido outlet is near a super store size. And, it is a rocks throw from a Costco. Side by side convenience shopping / competition for market share.
There are two smaller stores one focused on dry goods, furnishings, household, clothing, electronics, and bulk foods like sodas, chips, coffee, bread and other staples of that type.The other smaller store has a greater focus on grocery including depth and width in frozen goods. There is less square footage equally divided amongst the other main products.
Walmart seems to seek to compete with the internet market with an internet structured marketing approach competing with Amazon more than likely. However their pricing and products for electronics, furnishings, household goods is structured to competing with mass merchandisers like Costco and Sam Club with their superstores. Then they have smaller (Satellite?) stores offering competitive pricing for the neighborhood(s) approach with points of focus.
It is apparently driven by demographics and square footage. They both - Target and Walmart are profit centered with a emphasis on Return on Investment. Start up stores I would best guess is Walmart as Target if I remember correctly had recent closings.
So, maybe Target is expanding what is marketed with what square footage they have now seeking market share. That would indicate possibly Target is slightly ill within economic and business structure with much less flexibility than Walmart. Warmart is healthier and can afford to invest seeking a return in something new, e.g new stores.
They are both tiered marketeers - internet markets, focused wholesale pricing markets, retail hot products w/ competitive pricing, and the food industry w/ staples and bulk foods/dry goods at competitive pricing.