*if naturally carbed.
A sugar primed keg, a spiesed keg and a spunded keg will not all be created equal. I have tested all 3. As Edelstoff says, the speise will be the best you can do for bottle carbonation. But a spunded keg is the holy grail.
The serving oxidation will be faster with ales than it will be with lagers. Lager yeast can produce much higher fermentation derived sulfites( about 10-30ppm), while ale yeast struggle to produce 5ppm. Those fermentation derived sulfites are you key to post fermentation freshness. Once those sulfites get used up, next up is your hop and malt phenols.
Right. I was commenting on this.... "Even if you naturally carbonate in the keg to avoid force carbonating; wouldn't putting it on gas for serving eventually introduce oxygen anyways?" ...... so I figured that part was assumed