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I'm a bonafide aviation geek. I love plane spotting, and my friends sometimes joke that I act like Rain Man. We'll be playing volleyball near LAX, and when a widebody plane takes off, I'll tell everyone to look. I'll say something like, "Check it out, there's an A350 Air Tahiti Nui on its way to Papeete (or Paris)," or "There goes an Emirates A380 on its way to Dubai."

98% of my friends just roll their eyes because they could care less. But even though I know a lot about planes, some of the narrowbody aircraft confuse me -- and I'm not alone. Recently, one American Airlines (AA) passenger took to X (formerly Twitter) to ask a great question, and AA's response was surprisingly honest. Here's the dialogue:

Javier Manjarres

Paging @Americanair: Just out of curiosity, what is the difference between a A321 and a A321 neo aircraft?

@AmericanAir

Hello there! Our A321 has less pitch in the seating from First Class cabin to Main Cabin, has six fewer seats total and holds 96 fewer bags in the overhead bins. The neo aircraft has AC/USB power ports at all seats which the regular A321 doesn't offer.

Wow! You have to love AA's social media team's brutal honesty. For those who aren't familiar with the term "pitch", it refers to "the distance between a point on one seat and the same point on the seat in front of it." In simpler terms, it's basically legroom.

SeatGuru, which provides detailed seating information for most airlines and aircraft types, backs up AA's response. Here are the seating details for both aircraft: