Mods, please relocate if necessary.

I am an American Airlines Executive Platinum. I haven't flown JetBlue in many years.

I was looking for a flight from LAX to MIA and my sweet spot was AA Flagship Business. However, they are down to one flight per day on this route and on the day I want to travel (May 7) that flight is an afternoon, and I wanted a redeye. However, JetBlue has actually two flights with Mint on that route, leaving at 9:47PM and 10:15PM. The usuall AA fare is $699 and the JetBlue fares are $699 and $799.

I've heard good things about Mint, but I also noticed it was an A321 in 2-2 configuration, and the Flagship Biz flights on AA are 1-2-1 on a B777, which is much wider.

So my question is, how does the seat and the overall experience on A321 Mint compare to AA Flagship Business on a B777? Obviously the main thing I'm looking for is a comfortable way to sleep my way back to the east coast.