Does "Acholi" Differ Significantly from Luo to be a Separate Language?

I am still not sure if people in Acholiland consider their language Luo, or a dialect of Luo. I have heard some people say that they speak "Acholi" - reminds me a little of someone saying that they speak "American" rather than "English." Anyway, "how are you" in Acholi is actually spelled "Itye Ma Ber" - unlike the spelling fail that I wrote in my notebook (below). That final "R" on the end of Ber is tricky - the word is pronounced kinda like "Bay" with just a little tiny beginning of an "R."

Acholi