Originally Posted by
Baltodave
Thanks
PHL and
Horace . It seems AA has two A321neo configurations. The A321NX and the A321NX Kodiak. The Kodiak one uses rows 18 & 19 DEF as MCE while the other one has rows18-21 DEF as MCE. According to AA's website the A321neo has 47 MCE's which (by my count) would include rows 18-21.
I would recommend you pick a seat that is MCE on both variants since, as mentioned, most if not all the 321NEOs have been standardized.