Both offer the original regional business class cradle seats with 45" pitch. Adequate for regional flights. However, on the 773, there might be the chance you'll end up with the new regional business class seats. IMO, there are worse than the old cradle seats because the legroom is more limited even with the same pitch due to a restricted 'flap' obstructing the space under the seat in front of you. Best seat for you if you're very tall is maybe the first row.