The US grocery sector is being disrupted as Lidl ramps up its store count in the US and Amazon takes market share with its acquisition of Whole Foods.

We compared two stores in London and New York City to see how the shopping experience differed.

We found a big difference in price, quality, and variety.

America's grocery scene is in the midst of a major shake-up.

Last year, German discount store Lidl announced plans to expand in the US, and Amazon bought Whole Foods – both of which threatened to upend the US grocery market and send established national chains into aggressive price wars.

The grocery scene in New York City isn't immune from these changes, not only because there are several Whole Foods stores in the city, but also because the absence of a major national chain like Walmart makes for a unique shopping experience.

We looked at how different it is to go grocery shopping in London versus New York. We disregarded Whole Foods, as it's known to be a more premium store, and instead looked at two stores where customers would typically do a shopping trip in their neighborhood.

In London, we chose Tesco, the largest supermarket chain in the UK, which occupies 27.8% of market share but is also considered to be a typical neighborhood store. It has five different store formats ranging from city convenience stores to large supermarkets in suburban areas. For this exercise, we visited one of its Express stores, which are under 3,000 square feet in size.

There's no direct equivalent to this in New York City, so we picked a smaller chain, Gristedes, which has 30 stores across the city.

Here's what we found out: