Here’s how much wider the Airbus A320neo’s cabin is compared to the Boeing 737 MAX

By today's standards, the 737's cabin is rather narrow, and while the A320 is wider, it is far from the widest in its class.
Reuters

Zodiac says resolving jet cabin delays, launches A320 layout

PARIS (Reuters) - France's Zodiac said it was resolving recent delays in the supply of aircraft galleys and seating, and launched a new cabin configuration for the Airbus A320 that allows extra galley ...
SlashGear

Boeing 737 Vs Airbus A320: Size, Range, And Key Differences That Set The Two Apart

The United States' Boeing and the European Airbus have long been competing for their share of the lucrative global aviation markets. The former was established by William E. Boeing in 1916, while the ...