My suggestion would be to identify the flights you would be on and then check on Youtube.for recent trip reports on what the seats and possibly meals would be like. That's no guarantee, but should give you an idea. The reason I suggest this... everyone has their own preferences and biases. If you can "see" what you're potentially likely to get, you can make your decision on your own preferences. For example, you might not like the coffin type cubby hole where your feet go on one of the aircraft.... or you might like the bigger tray table to put your meal and your tablet on on the other type of plane...

It might not sound like much of an answer, but it will help you enjoy your flight better.