I have never noticed any difference..one thing I do love about kegging taste is I can dry hop in the keg and get much better aroma than in the bottle..but other than that they should be very close to the same..I do notice a slight difference in comercial bottle and draft beers but this could be how they age them as well..
Primary: DFH 60 IPA
Secondaty: Blond Ale, Apfelwine, Crandaddy mead
Bottle: Blue moon clone,Kolsch, Eds House Ale, Barley wine, Stone IPA, Oatmeal stout, Hefe,
Drinking: 60 minute IPA, Honkers Ale, Wheat, cherry wheat, Appfelwine,
On Deck: Imperial Stout,