My 13PM is doing pretty good still, I've used it this morning 1h straight and it lost just 6% of battery.
However, I don't use intense Apps / Games.
I'd go mad if the 14PM is worse in this aspect...
I'm also not sure whether I should use MagSafe or rather Cable...
After using MagSafe ONLY for one year, I'm still at 97% battery health.