LandCruiserPhil
Expedition Leader
I guess I'm looking at if from a pop-up camper perspective (based on the forum we're in) in which you have a few fixtures total and only a couple that will be similar (ie mabye one or two exterior and 2-3 interior) so the concern of mismatching really doesn't materialize in my mind and if it REALLY does bug you you'd only have to change out one or two others to match.
That said there would be the same concern in my mind with florescent bulbs, which also vary in those same aspects, years down the line if that is something that really concerns you. Probably best to stock up on some spare bulbs for either type of fixture with your original purchase if you think color/lumen output variation down the line is something that will bother you.
Our experience with fluorescent is when you purchase a 4100 kelvin lamp from one manufacture or another the color matches not so with LED so far.