Pressed cloth as opposed to woven cloth does not necessarily hold soils if the right detergent is used that provides good lubricity and is free rinsing. It is also important for the cloth to be rinsed constantly to flush any soils on them. Foam products do an excellent job for tri foams but in the wash process they tend to not make as much contact with the vehicle's surface as well as cloth. Done properly cloth cleans better in the wash process especially in mitters.
That is exactly what I think of cloth - a mitter with pressed cloth with a good detergent is very gentle and effective - used them in tunnels for years and never had any claim due to a mitter. I like the Ryko machines a lot, but I am a bit hesitant on a top wheel because it may be less forgiving on some vehicle configurations/accessories. I know it is more aggressive than a mitter and will be more thorough - that is a given, but I have to balance that with potential damage incidents. I know with the mitters, you can double up and wash in both directions, which gives you some more cleaning power.
I know Autec offers a cloth mitter with foam on the sides - I'll be checking to see if the Radiantz has the same option for materials. I'd be looking for foam on the side wheels.
I'll let you all know what I see, when I see it.