I really don't see that much of a difference... I still manage to get a lovely view from 62K as I do from 64K... All much of a muchness.

The only thing I don't like about 62K is sitting opposite the crew for take off and landing, and I disliked it as crew sitting opposite pax also... So, that is the only negative for me really.

I prefer it being a little cooler at 62 by the door too.