The Boeing 737-900ER, the newest and longest of the 737NG, was developed to replace the discontinued 757-200 and compete with the A321-200. It retained the same cockpit as the rest of the 737NGs. The 737-900ER had blended winglets as a standard addition, thus improving efficiency and range compared to the standard -900 which had the same MTOW and range as the -800. It has a 2950nmi range and a MTOW of 85.1t. The 739 can carry 177 passengers in a standard 2-class configuration.
So which is better?
I’d say the A321 wins here. With more powerful engines, more range, higher passenger capacity and a higher MTOW, the A321 is more versatile and can be suited to a wider variety of routes. It is also a better aircraft in terms of passenger comfort (wider seats and fuselage).
Which do you prefer? Comment below!