To me, it would indicate that they are pronounced differently. I’ve known a [name]Camila[/name] and a [name]Kamilah[/name], and it seems like people pick the spellings with one “l” to give the sound ka-MEE-la rather than ka-MILL-la. That might not always be the case, but I personally would pronounce them differently. That being said, I think C’s nearly always look more appealing on paper. The letter K, for whatever reason, strikes me as a not-very-classy letter. I think it may be all the K-substitutions for c’s that people make.