Do roof A/C's make more noise? Technically no.. but read on.
Roof air comes in two types.. Direct and Ducted.. Ducting muffles the noise so though they make a lot of noise.. you do not hear it.. Direct outlet types (Where the air goes in one side of the big grill and comes out the other) are way noiser.
Basement air is always ducted.. So its always muffeled.
Which does a better job?
Hot air rises.. Cool air sinks.. ROOF air is mounted where it's hottest so it has the best shot at cooling the ENTIRE coach
Basement air does agreat job on your ankles
Which is easier to fix? When my roof Air quite it took a few days.
First I had to go to the dealer, Select and purchase a new upper unit
Then I picked up the adapt-a-kit and read the instructions (Figgered someone should) and made an appointment.
Then I went in and in less than an hour the new one was installed and tested.