This is my first RV AC. I didn't have one before because I bought it in Alaska, and didn't have this heat, and Mama was OK with it:), so I can't compare the noise. I can say that it is a lot quieter than I expected. Given that the fan stays blowing, when the compressor kicks on, there is not much of a noise change. I have yet to camp in it, but I have a feeling it will disturb my sleep less than the heater. I will get some numbers in a day or two.
I just started the 2000 in normal run mode, let it warm up a bit, then plugged in. I left it on normal/non Eco mode the whole time. I will also run it again in Eco mode and see how it does.