How does American's 787-9 compare to the 777-300ER?

Question

Accepted Answer

The 787-9 has much better economy seating than the 777-300ER. The 787-9 uses 3-3-3 (9 across, max 2 neighbors) versus the 777-300ER's 3-4-3 (10 across, center 4-seat block with 2 neighbors). MCE (free for all) is 2-4-2 on the 787-9 — the side 2-seat sections (A/B or K/L) have just 1 neighbor. Always choose the 787-9 over the 777-300ER for long-haul international flights if available.

American Airlines Boeing 787-9 Seat Map